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paper thumbnail of Study of heat transfer inside of a wavy falling film by laser induced fluorescence techniques" class="work-thumbnail" src="https://attachments.academia-assets.com/91610140/thumbnails/1.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/87387662/Study_of_heat_transfer_inside_of_a_wavy_falling_film_by_laser_induced_fluorescence_techniques">Study of heat transfer inside of a wavy falling film by laser induced fluorescence techniques</a></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">Les films liquide minces à instabilités de surface sont utilisés dans de nombreuses applications ...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">Les films liquide minces à instabilités de surface sont utilisés dans de nombreuses applications industrielles comme promoteurs des transferts de chaleur et de masse, dans les échangeurs à plaques ou dans les colonnes de refroidissement de centrales nucléaires par exemple. Cependant, les mécanismes de l’intensification des transferts liés aux instabilités sont encore mal compris et les modèles ne permettent pas de rendre compte de l’ensemble des phénomènes physiques et de leurs couplages. Le but de ces travaux est d’étudier expérimentalement l’intensification des transferts de chaleur entre une paroi chauffée plane inclinée et le film liquide lorsqu’il est parcouru de vagues 2D à sa surface. Pour cela un dispositif expérimental a été développé, permettant d’imposer des perturbations à un film d’eau s’écoulant sur une feuille mince de titane, chauffée par effet Joule. Deux techniques de mesure non-intrusives, basées sur la technique de fluorescence induite par laser (LIF) à deux colo...</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><a id="b5363591abf634ea8b47b0bc9d8134e5" class="wp-workCard--action" rel="nofollow" data-click-track="profile-work-strip-download" data-download="{"attachment_id":91610140,"asset_id":87387662,"asset_type":"Work","button_location":"profile"}" href="https://www.academia.edu/attachments/91610140/download_file?st=MTczMjQ0NTY0OSw4LjIyMi4yMDguMTQ2&s=profile"><span><i class="fa fa-arrow-down"></i></span><span>Download</span></a><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="87387662"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="87387662"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 87387662; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=87387662]").text(description); $(".js-view-count[data-work-id=87387662]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 87387662; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='87387662']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 87387662, container: "", }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-f77ea15d77ce96025a6048a514272ad8becbad23c641fc2b3bd6e24ca6ff1932.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (true){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "b5363591abf634ea8b47b0bc9d8134e5" } } $('.js-work-strip[data-work-id=87387662]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":87387662,"title":"Study of heat transfer inside of a wavy falling film by laser induced fluorescence techniques","translated_title":"","metadata":{"abstract":"Les films liquide minces à instabilités de surface sont utilisés dans de nombreuses applications industrielles comme promoteurs des transferts de chaleur et de masse, dans les échangeurs à plaques ou dans les colonnes de refroidissement de centrales nucléaires par exemple. 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$(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="87387660"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/87387660/LIF_measurements_resolved_in_time_of_temperature_and_thickness_of_a_liquid_film_with_surface_instability_flowing_down_an_inclined_surface"><img alt="Research paper thumbnail of LIF measurements resolved in time of temperature and thickness of a liquid film with surface instability flowing down an inclined surface" class="work-thumbnail" src="https://a.academia-assets.com/images/blank-paper.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/87387660/LIF_measurements_resolved_in_time_of_temperature_and_thickness_of_a_liquid_film_with_surface_instability_flowing_down_an_inclined_surface">LIF measurements resolved in time of temperature and thickness of a liquid film with surface instability flowing down an inclined surface</a></div><div class="wp-workCard_item"><span>OpenScience</span><span>, Jul 7, 2020</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="87387660"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="87387660"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 87387660; 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$(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="87387656"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/87387656/Etude_exp%C3%A9rimentale_du_transfert_de_chaleur_dans_des_films_liquides_ruisselants_instables"><img alt="Research paper thumbnail of Etude expérimentale du transfert de chaleur dans des films liquides ruisselants instables" class="work-thumbnail" src="https://a.academia-assets.com/images/blank-paper.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/87387656/Etude_exp%C3%A9rimentale_du_transfert_de_chaleur_dans_des_films_liquides_ruisselants_instables">Etude expérimentale du transfert de chaleur dans des films liquides ruisselants instables</a></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">Le ruissellement de films liquides minces est rencontré dans une variété de procédés, notamment l...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">Le ruissellement de films liquides minces est rencontré dans une variété de procédés, notamment les condenseurs, les évaporateurs ou encore les colonnes d&#39;absorption à film tombant. En général, les conditions rencontrées dans ces applications sont telles que la surface libre du film est instable et que des vagues s&#39;y propagent. Depuis longtemps, la présence des vagues est utilisée pour intensifier les transferts de chaleur et de masse à travers le film liquide. Cependant, les mécanismes à l&#39;origine de cette intensification ne sont pas toujours pas complètement élucidés, les couplages entre l&#39;hydrodynamique et la thermique rendant la modélisation complexe. L&#39;augmentation de la surface d&#39;échange entre le liquide et le gaz, la formation de rouleaux dans la crête des vagues, l&#39;amincissement du film devant le front de vague sont autant de phénomènes qui peuvent jouer un rôle important. Dans cette étude, le transfert de chaleur dans un film liquide mince qui s&...</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="87387656"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="87387656"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 87387656; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=87387656]").text(description); $(".js-view-count[data-work-id=87387656]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 87387656; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='87387656']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 87387656, container: "", }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-f77ea15d77ce96025a6048a514272ad8becbad23c641fc2b3bd6e24ca6ff1932.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (false){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "-1" } } $('.js-work-strip[data-work-id=87387656]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":87387656,"title":"Etude expérimentale du transfert de chaleur dans des films liquides ruisselants instables","translated_title":"","metadata":{"abstract":"Le ruissellement de films liquides minces est rencontré dans une variété de procédés, notamment les condenseurs, les évaporateurs ou encore les colonnes d\u0026#39;absorption à film tombant. En général, les conditions rencontrées dans ces applications sont telles que la surface libre du film est instable et que des vagues s\u0026#39;y propagent. Depuis longtemps, la présence des vagues est utilisée pour intensifier les transferts de chaleur et de masse à travers le film liquide. Cependant, les mécanismes à l\u0026#39;origine de cette intensification ne sont pas toujours pas complètement élucidés, les couplages entre l\u0026#39;hydrodynamique et la thermique rendant la modélisation complexe. L\u0026#39;augmentation de la surface d\u0026#39;échange entre le liquide et le gaz, la formation de rouleaux dans la crête des vagues, l\u0026#39;amincissement du film devant le front de vague sont autant de phénomènes qui peuvent jouer un rôle important. 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L\u0026#39;augmentation de la surface d\u0026#39;échange entre le liquide et le gaz, la formation de rouleaux dans la crête des vagues, l\u0026#39;amincissement du film devant le front de vague sont autant de phénomènes qui peuvent jouer un rôle important. Dans cette étude, le transfert de chaleur dans un film liquide mince qui s\u0026...","internal_url":"https://www.academia.edu/87387656/Etude_exp%C3%A9rimentale_du_transfert_de_chaleur_dans_des_films_liquides_ruisselants_instables","translated_internal_url":"","created_at":"2022-09-26T22:29:28.121-07:00","preview_url":null,"current_user_can_edit":null,"current_user_is_owner":null,"owner_id":15821148,"coauthors_can_edit":true,"document_type":"paper","co_author_tags":[],"downloadable_attachments":[],"slug":"Etude_expérimentale_du_transfert_de_chaleur_dans_des_films_liquides_ruisselants_instables","translated_slug":"","page_count":null,"language":"fr","content_type":"Work","owner":{"id":15821148,"first_name":"Romain","middle_initials":null,"last_name":"Collignon","page_name":"RomainCollignon","domain_name":"independent","created_at":"2014-08-29T22:36:52.856-07:00","display_name":"Romain Collignon","url":"https://independent.academia.edu/RomainCollignon"},"attachments":[],"research_interests":[],"urls":[]}, dispatcherData: dispatcherData }); $(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="87387654"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/87387654/Drop_impact_in_the_regime_of_film_boiling_transient_evolution_of_the_heat_transfer_and_the_vapor_film_thickness"><img alt="Research paper thumbnail of Drop impact in the regime of film boiling : transient evolution of the heat transfer and the vapor film thickness" class="work-thumbnail" src="https://attachments.academia-assets.com/91610141/thumbnails/1.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/87387654/Drop_impact_in_the_regime_of_film_boiling_transient_evolution_of_the_heat_transfer_and_the_vapor_film_thickness">Drop impact in the regime of film boiling : transient evolution of the heat transfer and the vapor film thickness</a></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">When a drop impinges onto a wall heated above the Leidenfrost temperature, a very thin vapor film...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">When a drop impinges onto a wall heated above the Leidenfrost temperature, a very thin vapor film is formed at the interface between the liquid and the solid substrate. This vapor layer modifies the impact behavior of the drop and induces a significant decrease in heat transfer. To study this phenomenon, a model is proposed for the growth of the vapor film and the heat transfer at the impact. The main assumptions are: (i) a uniform but time varying thickness of the vapor film, (ii) a quasi-steady Poiseuille flow inside the vapor film, and (iii) a constant wall temperature. Heat energy and momentum balances are employed to obtain an ordinary differential equation describing the evolution of the vapor film thickness during the drop impact. Upon a one-dimensional analysis (nonetheless including some effects due to the complex fluid flow), the local heat flux transferred to the liquid qL can be evaluated. When the initial drop temperature is sufficiently lower than the saturation temper...</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><a id="f60d7256aad27ec4eb57796ebc564cbe" class="wp-workCard--action" rel="nofollow" data-click-track="profile-work-strip-download" data-download="{"attachment_id":91610141,"asset_id":87387654,"asset_type":"Work","button_location":"profile"}" href="https://www.academia.edu/attachments/91610141/download_file?st=MTczMjQ0NTY0OSw4LjIyMi4yMDguMTQ2&s=profile"><span><i class="fa fa-arrow-down"></i></span><span>Download</span></a><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="87387654"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="87387654"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 87387654; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=87387654]").text(description); $(".js-view-count[data-work-id=87387654]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 87387654; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='87387654']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 87387654, container: "", }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-f77ea15d77ce96025a6048a514272ad8becbad23c641fc2b3bd6e24ca6ff1932.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (true){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "f60d7256aad27ec4eb57796ebc564cbe" } } $('.js-work-strip[data-work-id=87387654]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":87387654,"title":"Drop impact in the regime of film boiling : transient evolution of the heat transfer and the vapor film thickness","translated_title":"","metadata":{"abstract":"When a drop impinges onto a wall heated above the Leidenfrost temperature, a very thin vapor film is formed at the interface between the liquid and the solid substrate. This vapor layer modifies the impact behavior of the drop and induces a significant decrease in heat transfer. To study this phenomenon, a model is proposed for the growth of the vapor film and the heat transfer at the impact. The main assumptions are: (i) a uniform but time varying thickness of the vapor film, (ii) a quasi-steady Poiseuille flow inside the vapor film, and (iii) a constant wall temperature. Heat energy and momentum balances are employed to obtain an ordinary differential equation describing the evolution of the vapor film thickness during the drop impact. Upon a one-dimensional analysis (nonetheless including some effects due to the complex fluid flow), the local heat flux transferred to the liquid qL can be evaluated. 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Upon a one-dimensional analysis (nonetheless including some effects due to the complex fluid flow), the local heat flux transferred to the liquid qL can be evaluated. 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$(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="87387651"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/87387651/Temperature_distribution_in_the_cross_section_of_wavy_and_falling_thin_liquid_films"><img alt="Research paper thumbnail of Temperature distribution in the cross section of wavy and falling thin liquid films" class="work-thumbnail" src="https://a.academia-assets.com/images/blank-paper.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/87387651/Temperature_distribution_in_the_cross_section_of_wavy_and_falling_thin_liquid_films">Temperature distribution in the cross section of wavy and falling thin liquid films</a></div><div class="wp-workCard_item"><span>Experiments in Fluids</span><span>, 2021</span></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">Wave instabilities of falling liquid films are crucial in many applications to enhance heat and m...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">Wave instabilities of falling liquid films are crucial in many applications to enhance heat and mass transfer. Despite the importance of this issue, the interplay between the heat transfer and the wavy dynamics of falling films is still not completely understood. To get more insight, a planar laser-induced fluorescence technique has been developed for imaging the temperature distribution in the cross section of thin liquid films (approximately 0.5–1 mm thick), which are falling down an inclined heated surface. This study reports on the implementation of this imaging technique. It also discusses its advantages and limitations for the investigation of the heat transfer in the falling liquid films. Two-dimensional flow conditions and regular waves are considered for the reconstruction of a complete temperature field in the waves. Measurements provide new understanding of the wave ability to generate mixing within the film. Temperature maps reveal preferential regions where mixing occurs first, before eventually spreading to the rest of the film if the wave amplitude and the travel distance are large enough. The increase in the heat transfer coefficient is directly related to the internal mixing observed in the temperature images.</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="87387651"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="87387651"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 87387651; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=87387651]").text(description); $(".js-view-count[data-work-id=87387651]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 87387651; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='87387651']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 87387651, container: "", }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-f77ea15d77ce96025a6048a514272ad8becbad23c641fc2b3bd6e24ca6ff1932.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (false){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "-1" } } $('.js-work-strip[data-work-id=87387651]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":87387651,"title":"Temperature distribution in the cross section of wavy and falling thin liquid films","translated_title":"","metadata":{"abstract":"Wave instabilities of falling liquid films are crucial in many applications to enhance heat and mass transfer. Despite the importance of this issue, the interplay between the heat transfer and the wavy dynamics of falling films is still not completely understood. To get more insight, a planar laser-induced fluorescence technique has been developed for imaging the temperature distribution in the cross section of thin liquid films (approximately 0.5–1 mm thick), which are falling down an inclined heated surface. This study reports on the implementation of this imaging technique. It also discusses its advantages and limitations for the investigation of the heat transfer in the falling liquid films. Two-dimensional flow conditions and regular waves are considered for the reconstruction of a complete temperature field in the waves. Measurements provide new understanding of the wave ability to generate mixing within the film. Temperature maps reveal preferential regions where mixing occurs first, before eventually spreading to the rest of the film if the wave amplitude and the travel distance are large enough. The increase in the heat transfer coefficient is directly related to the internal mixing observed in the temperature images.","publisher":"Springer Science and Business Media LLC","publication_date":{"day":null,"month":null,"year":2021,"errors":{}},"publication_name":"Experiments in Fluids"},"translated_abstract":"Wave instabilities of falling liquid films are crucial in many applications to enhance heat and mass transfer. Despite the importance of this issue, the interplay between the heat transfer and the wavy dynamics of falling films is still not completely understood. To get more insight, a planar laser-induced fluorescence technique has been developed for imaging the temperature distribution in the cross section of thin liquid films (approximately 0.5–1 mm thick), which are falling down an inclined heated surface. This study reports on the implementation of this imaging technique. It also discusses its advantages and limitations for the investigation of the heat transfer in the falling liquid films. Two-dimensional flow conditions and regular waves are considered for the reconstruction of a complete temperature field in the waves. Measurements provide new understanding of the wave ability to generate mixing within the film. Temperature maps reveal preferential regions where mixing occurs first, before eventually spreading to the rest of the film if the wave amplitude and the travel distance are large enough. The increase in the heat transfer coefficient is directly related to the internal mixing observed in the temperature images.","internal_url":"https://www.academia.edu/87387651/Temperature_distribution_in_the_cross_section_of_wavy_and_falling_thin_liquid_films","translated_internal_url":"","created_at":"2022-09-26T22:29:27.478-07:00","preview_url":null,"current_user_can_edit":null,"current_user_is_owner":null,"owner_id":15821148,"coauthors_can_edit":true,"document_type":"paper","co_author_tags":[],"downloadable_attachments":[],"slug":"Temperature_distribution_in_the_cross_section_of_wavy_and_falling_thin_liquid_films","translated_slug":"","page_count":null,"language":"en","content_type":"Work","owner":{"id":15821148,"first_name":"Romain","middle_initials":null,"last_name":"Collignon","page_name":"RomainCollignon","domain_name":"independent","created_at":"2014-08-29T22:36:52.856-07:00","display_name":"Romain Collignon","url":"https://independent.academia.edu/RomainCollignon"},"attachments":[],"research_interests":[{"id":60,"name":"Mechanical Engineering","url":"https://www.academia.edu/Documents/in/Mechanical_Engineering"},{"id":88,"name":"Aerospace Engineering","url":"https://www.academia.edu/Documents/in/Aerospace_Engineering"},{"id":511,"name":"Materials Science","url":"https://www.academia.edu/Documents/in/Materials_Science"},{"id":512,"name":"Mechanics","url":"https://www.academia.edu/Documents/in/Mechanics"},{"id":554780,"name":"Interdisciplinary Engineering","url":"https://www.academia.edu/Documents/in/Interdisciplinary_Engineering"}],"urls":[{"id":24216783,"url":"https://link.springer.com/content/pdf/10.1007/s00348-021-03175-x.pdf"}]}, dispatcherData: dispatcherData }); 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$(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="87387645"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/87387645/The_Leidenfrost_transition_of_water_droplets_impinging_onto_a_superheated_surface"><img alt="Research paper thumbnail of The Leidenfrost transition of water droplets impinging onto a superheated surface" class="work-thumbnail" src="https://a.academia-assets.com/images/blank-paper.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/87387645/The_Leidenfrost_transition_of_water_droplets_impinging_onto_a_superheated_surface">The Leidenfrost transition of water droplets impinging onto a superheated surface</a></div><div class="wp-workCard_item"><span>International Journal of Heat and Mass Transfer</span><span>, 2020</span></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">Abstract Water droplets impinge on a sapphire wall heated to a temperature ranging from 300∘C to ...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">Abstract Water droplets impinge on a sapphire wall heated to a temperature ranging from 300∘C to 700∘C. Advanced measurement techniques are used to characterize the thermal processes associated with the drop impact. IR thermography, implemented by coating the impacted surface with an opaque and emissive material in the IR domain, makes it possible to measure the temperature of the solid surface during the impact process. Laser-induced fluorescence imaging is used to characterize the temperature field in the spreading droplet. At the onset of film boiling, the temperature distribution on the solid surface is marked by the formation of a fingering pattern. This latter corresponds to spatial fluctuations in the thickness of the vapor film. When a water droplet hits an overheated wall with a significant impact velocity, the thermal contact is so rapid and intense that the liquid temperature can largely overtake the saturation temperature and reach the spinodal temperature, i.e. the highest temperature at which water can exist in the liquid state. In this situation, experiments show that the dynamic Leidenfrost point is directly linked to the spinodal temperature. A superheating of the liquid by several hundred of ∘C and the subsequent homogeneous nucleation, have to be considered to describe the heat transfer in the film boiling regime.</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="87387645"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="87387645"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 87387645; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=87387645]").text(description); $(".js-view-count[data-work-id=87387645]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 87387645; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='87387645']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 87387645, container: "", }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-f77ea15d77ce96025a6048a514272ad8becbad23c641fc2b3bd6e24ca6ff1932.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (false){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "-1" } } $('.js-work-strip[data-work-id=87387645]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":87387645,"title":"The Leidenfrost transition of water droplets impinging onto a superheated surface","translated_title":"","metadata":{"abstract":"Abstract Water droplets impinge on a sapphire wall heated to a temperature ranging from 300∘C to 700∘C. Advanced measurement techniques are used to characterize the thermal processes associated with the drop impact. IR thermography, implemented by coating the impacted surface with an opaque and emissive material in the IR domain, makes it possible to measure the temperature of the solid surface during the impact process. Laser-induced fluorescence imaging is used to characterize the temperature field in the spreading droplet. At the onset of film boiling, the temperature distribution on the solid surface is marked by the formation of a fingering pattern. This latter corresponds to spatial fluctuations in the thickness of the vapor film. When a water droplet hits an overheated wall with a significant impact velocity, the thermal contact is so rapid and intense that the liquid temperature can largely overtake the saturation temperature and reach the spinodal temperature, i.e. the highest temperature at which water can exist in the liquid state. In this situation, experiments show that the dynamic Leidenfrost point is directly linked to the spinodal temperature. A superheating of the liquid by several hundred of ∘C and the subsequent homogeneous nucleation, have to be considered to describe the heat transfer in the film boiling regime.","publisher":"Elsevier BV","publication_date":{"day":null,"month":null,"year":2020,"errors":{}},"publication_name":"International Journal of Heat and Mass Transfer"},"translated_abstract":"Abstract Water droplets impinge on a sapphire wall heated to a temperature ranging from 300∘C to 700∘C. Advanced measurement techniques are used to characterize the thermal processes associated with the drop impact. IR thermography, implemented by coating the impacted surface with an opaque and emissive material in the IR domain, makes it possible to measure the temperature of the solid surface during the impact process. Laser-induced fluorescence imaging is used to characterize the temperature field in the spreading droplet. At the onset of film boiling, the temperature distribution on the solid surface is marked by the formation of a fingering pattern. This latter corresponds to spatial fluctuations in the thickness of the vapor film. When a water droplet hits an overheated wall with a significant impact velocity, the thermal contact is so rapid and intense that the liquid temperature can largely overtake the saturation temperature and reach the spinodal temperature, i.e. the highest temperature at which water can exist in the liquid state. In this situation, experiments show that the dynamic Leidenfrost point is directly linked to the spinodal temperature. A superheating of the liquid by several hundred of ∘C and the subsequent homogeneous nucleation, have to be considered to describe the heat transfer in the film boiling regime.","internal_url":"https://www.academia.edu/87387645/The_Leidenfrost_transition_of_water_droplets_impinging_onto_a_superheated_surface","translated_internal_url":"","created_at":"2022-09-26T22:29:26.874-07:00","preview_url":null,"current_user_can_edit":null,"current_user_is_owner":null,"owner_id":15821148,"coauthors_can_edit":true,"document_type":"paper","co_author_tags":[],"downloadable_attachments":[],"slug":"The_Leidenfrost_transition_of_water_droplets_impinging_onto_a_superheated_surface","translated_slug":"","page_count":null,"language":"en","content_type":"Work","owner":{"id":15821148,"first_name":"Romain","middle_initials":null,"last_name":"Collignon","page_name":"RomainCollignon","domain_name":"independent","created_at":"2014-08-29T22:36:52.856-07:00","display_name":"Romain Collignon","url":"https://independent.academia.edu/RomainCollignon"},"attachments":[],"research_interests":[{"id":48,"name":"Engineering","url":"https://www.academia.edu/Documents/in/Engineering"},{"id":511,"name":"Materials Science","url":"https://www.academia.edu/Documents/in/Materials_Science"},{"id":522,"name":"Thermodynamics","url":"https://www.academia.edu/Documents/in/Thermodynamics"},{"id":33661,"name":"Heat and Mass Transfer","url":"https://www.academia.edu/Documents/in/Heat_and_Mass_Transfer"},{"id":80414,"name":"Mathematical Sciences","url":"https://www.academia.edu/Documents/in/Mathematical_Sciences"},{"id":118582,"name":"Physical sciences","url":"https://www.academia.edu/Documents/in/Physical_sciences"},{"id":2489916,"name":"Superheating","url":"https://www.academia.edu/Documents/in/Superheating"}],"urls":[{"id":24216780,"url":"https://api.elsevier.com/content/article/PII:S0017931020330623?httpAccept=text/xml"}]}, dispatcherData: dispatcherData }); $(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="87387642"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/87387642/Transient_evolution_of_the_heat_transfer_and_the_vapor_film_thickness_at_the_drop_impact_in_the_regime_of_film_boiling"><img alt="Research paper thumbnail of Transient evolution of the heat transfer and the vapor film thickness at the drop impact in the regime of film boiling" class="work-thumbnail" src="https://attachments.academia-assets.com/91610195/thumbnails/1.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/87387642/Transient_evolution_of_the_heat_transfer_and_the_vapor_film_thickness_at_the_drop_impact_in_the_regime_of_film_boiling">Transient evolution of the heat transfer and the vapor film thickness at the drop impact in the regime of film boiling</a></div><div class="wp-workCard_item"><span>Physics of Fluids</span><span>, 2018</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><a id="eabb7cb3afa0e610d0525fe8254f5d32" class="wp-workCard--action" rel="nofollow" data-click-track="profile-work-strip-download" data-download="{"attachment_id":91610195,"asset_id":87387642,"asset_type":"Work","button_location":"profile"}" href="https://www.academia.edu/attachments/91610195/download_file?st=MTczMjQ0NTY0OSw4LjIyMi4yMDguMTQ2&s=profile"><span><i class="fa fa-arrow-down"></i></span><span>Download</span></a><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="87387642"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="87387642"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 87387642; 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$(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="87387619"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/87387619/Temporally_resolved_PLIF_measurements_of_the_temperature_inside_droplets_impinging_on_a_hot_solid_surface"><img alt="Research paper thumbnail of Temporally resolved PLIF measurements of the temperature inside droplets impinging on a hot solid surface" class="work-thumbnail" src="https://attachments.academia-assets.com/91610112/thumbnails/1.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/87387619/Temporally_resolved_PLIF_measurements_of_the_temperature_inside_droplets_impinging_on_a_hot_solid_surface">Temporally resolved PLIF measurements of the temperature inside droplets impinging on a hot solid surface</a></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">Heat transfers at the impact of a droplet on a hot solid surface are investigated experimentally....</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">Heat transfers at the impact of a droplet on a hot solid surface are investigated experimentally. Millimeter-sized droplets impinge a heated flat sapphire window. The time evolution of the droplet temperature is characterized using the two-color laser-induced fluorescence technique. For that, a Q-switched Nd:YAG laser is used for the excitation of the fluorescence in order to obtain instantaneous images of the droplet temperature. The fluid under investigation is seeded with two fluorescent dyes, one sensitive to temperature (fluorescein disodium) and the other not (sulforhodamine 640). Owing to a wavelength shift between the dyes&#39; emissions, the fluorescence signal of the dyes can be detected separately by two cameras. The liquid temperature is determined with a good accuracy by doing the ratio of the images of the dyes&#39; fluorescence. A critical feature of the method is that the image ratio is not disturbed by the deformation of the impacting droplet, which affects the sign...</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><a id="74c73a0d67a73a71ebd81decaeb3ab70" class="wp-workCard--action" rel="nofollow" data-click-track="profile-work-strip-download" data-download="{"attachment_id":91610112,"asset_id":87387619,"asset_type":"Work","button_location":"profile"}" href="https://www.academia.edu/attachments/91610112/download_file?st=MTczMjQ0NTY0OSw4LjIyMi4yMDguMTQ2&s=profile"><span><i class="fa fa-arrow-down"></i></span><span>Download</span></a><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="87387619"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="87387619"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 87387619; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=87387619]").text(description); $(".js-view-count[data-work-id=87387619]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 87387619; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='87387619']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 87387619, container: "", }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-f77ea15d77ce96025a6048a514272ad8becbad23c641fc2b3bd6e24ca6ff1932.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (true){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "74c73a0d67a73a71ebd81decaeb3ab70" } } $('.js-work-strip[data-work-id=87387619]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":87387619,"title":"Temporally resolved PLIF measurements of the temperature inside droplets impinging on a hot solid surface","translated_title":"","metadata":{"abstract":"Heat transfers at the impact of a droplet on a hot solid surface are investigated experimentally. Millimeter-sized droplets impinge a heated flat sapphire window. The time evolution of the droplet temperature is characterized using the two-color laser-induced fluorescence technique. For that, a Q-switched Nd:YAG laser is used for the excitation of the fluorescence in order to obtain instantaneous images of the droplet temperature. The fluid under investigation is seeded with two fluorescent dyes, one sensitive to temperature (fluorescein disodium) and the other not (sulforhodamine 640). Owing to a wavelength shift between the dyes\u0026#39; emissions, the fluorescence signal of the dyes can be detected separately by two cameras. The liquid temperature is determined with a good accuracy by doing the ratio of the images of the dyes\u0026#39; fluorescence. A critical feature of the method is that the image ratio is not disturbed by the deformation of the impacting droplet, which affects the sign...","publication_date":{"day":null,"month":null,"year":2018,"errors":{}}},"translated_abstract":"Heat transfers at the impact of a droplet on a hot solid surface are investigated experimentally. Millimeter-sized droplets impinge a heated flat sapphire window. The time evolution of the droplet temperature is characterized using the two-color laser-induced fluorescence technique. For that, a Q-switched Nd:YAG laser is used for the excitation of the fluorescence in order to obtain instantaneous images of the droplet temperature. The fluid under investigation is seeded with two fluorescent dyes, one sensitive to temperature (fluorescein disodium) and the other not (sulforhodamine 640). Owing to a wavelength shift between the dyes\u0026#39; emissions, the fluorescence signal of the dyes can be detected separately by two cameras. The liquid temperature is determined with a good accuracy by doing the ratio of the images of the dyes\u0026#39; fluorescence. A critical feature of the method is that the image ratio is not disturbed by the deformation of the impacting droplet, which affects the sign...","internal_url":"https://www.academia.edu/87387619/Temporally_resolved_PLIF_measurements_of_the_temperature_inside_droplets_impinging_on_a_hot_solid_surface","translated_internal_url":"","created_at":"2022-09-26T22:29:04.431-07:00","preview_url":null,"current_user_can_edit":null,"current_user_is_owner":null,"owner_id":15821148,"coauthors_can_edit":true,"document_type":"paper","co_author_tags":[],"downloadable_attachments":[{"id":91610112,"title":"","file_type":"pdf","scribd_thumbnail_url":"https://attachments.academia-assets.com/91610112/thumbnails/1.jpg","file_name":"document.pdf","download_url":"https://www.academia.edu/attachments/91610112/download_file?st=MTczMjQ0NTY0OSw4LjIyMi4yMDguMTQ2&","bulk_download_file_name":"Temporally_resolved_PLIF_measurements_of.pdf","bulk_download_url":"https://d1wqtxts1xzle7.cloudfront.net/91610112/document-libre.pdf?1664258149=\u0026response-content-disposition=attachment%3B+filename%3DTemporally_resolved_PLIF_measurements_of.pdf\u0026Expires=1732449249\u0026Signature=H7B0WoS24p6Uq0ABIS8VqpWw93xUkpWiAxQB79lzBP~yBHcZu7EQEMfmiBK7YK-9hP02jR2Pm77mRkloj1hBKM2H9OGBvd9FHhPanatqQGGMZf9x9fk55NL9EYjvpJxSDh-mj49bvp2vw-kBvzfH~x0u3SNLwkjV~FftbXp9ufLEO9OxRu9U--0Win3LDtJ6lMPXRg59bpDtVQT1RN~TEdeEo5JI~7uMWPYX1KhJg-o1acgencT9FXYOtyNhfhc7GtjMoDM~WCp6smx0uQbWHJLlCnC0t~g9p69wcUyO5aVvpx07aGAKdEbGXYqPWMgYKwmD1Q5J8aC2auENeE13yQ__\u0026Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA"}],"slug":"Temporally_resolved_PLIF_measurements_of_the_temperature_inside_droplets_impinging_on_a_hot_solid_surface","translated_slug":"","page_count":16,"language":"en","content_type":"Work","owner":{"id":15821148,"first_name":"Romain","middle_initials":null,"last_name":"Collignon","page_name":"RomainCollignon","domain_name":"independent","created_at":"2014-08-29T22:36:52.856-07:00","display_name":"Romain Collignon","url":"https://independent.academia.edu/RomainCollignon"},"attachments":[{"id":91610112,"title":"","file_type":"pdf","scribd_thumbnail_url":"https://attachments.academia-assets.com/91610112/thumbnails/1.jpg","file_name":"document.pdf","download_url":"https://www.academia.edu/attachments/91610112/download_file?st=MTczMjQ0NTY0OSw4LjIyMi4yMDguMTQ2&","bulk_download_file_name":"Temporally_resolved_PLIF_measurements_of.pdf","bulk_download_url":"https://d1wqtxts1xzle7.cloudfront.net/91610112/document-libre.pdf?1664258149=\u0026response-content-disposition=attachment%3B+filename%3DTemporally_resolved_PLIF_measurements_of.pdf\u0026Expires=1732449249\u0026Signature=H7B0WoS24p6Uq0ABIS8VqpWw93xUkpWiAxQB79lzBP~yBHcZu7EQEMfmiBK7YK-9hP02jR2Pm77mRkloj1hBKM2H9OGBvd9FHhPanatqQGGMZf9x9fk55NL9EYjvpJxSDh-mj49bvp2vw-kBvzfH~x0u3SNLwkjV~FftbXp9ufLEO9OxRu9U--0Win3LDtJ6lMPXRg59bpDtVQT1RN~TEdeEo5JI~7uMWPYX1KhJg-o1acgencT9FXYOtyNhfhc7GtjMoDM~WCp6smx0uQbWHJLlCnC0t~g9p69wcUyO5aVvpx07aGAKdEbGXYqPWMgYKwmD1Q5J8aC2auENeE13yQ__\u0026Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA"}],"research_interests":[{"id":511,"name":"Materials Science","url":"https://www.academia.edu/Documents/in/Materials_Science"},{"id":4135,"name":"Laser","url":"https://www.academia.edu/Documents/in/Laser"},{"id":7698,"name":"Fluorescence","url":"https://www.academia.edu/Documents/in/Fluorescence"},{"id":394507,"name":"Wavelength","url":"https://www.academia.edu/Documents/in/Wavelength"},{"id":972442,"name":"Boiling","url":"https://www.academia.edu/Documents/in/Boiling"}],"urls":[{"id":24216764,"url":"https://hal.univ-lorraine.fr/hal-01863893/document"}]}, dispatcherData: dispatcherData }); $(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> </div><div class="profile--tab_content_container js-tab-pane tab-pane" data-section-id="15910942" id="papers"><div class="js-work-strip profile--work_container" data-work-id="87387662"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/87387662/Study_of_heat_transfer_inside_of_a_wavy_falling_film_by_laser_induced_fluorescence_techniques"><img alt="Research paper thumbnail of Study of heat transfer inside of a wavy falling film by laser induced fluorescence techniques" class="work-thumbnail" src="https://attachments.academia-assets.com/91610140/thumbnails/1.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/87387662/Study_of_heat_transfer_inside_of_a_wavy_falling_film_by_laser_induced_fluorescence_techniques">Study of heat transfer inside of a wavy falling film by laser induced fluorescence techniques</a></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">Les films liquide minces à instabilités de surface sont utilisés dans de nombreuses applications ...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">Les films liquide minces à instabilités de surface sont utilisés dans de nombreuses applications industrielles comme promoteurs des transferts de chaleur et de masse, dans les échangeurs à plaques ou dans les colonnes de refroidissement de centrales nucléaires par exemple. Cependant, les mécanismes de l’intensification des transferts liés aux instabilités sont encore mal compris et les modèles ne permettent pas de rendre compte de l’ensemble des phénomènes physiques et de leurs couplages. Le but de ces travaux est d’étudier expérimentalement l’intensification des transferts de chaleur entre une paroi chauffée plane inclinée et le film liquide lorsqu’il est parcouru de vagues 2D à sa surface. Pour cela un dispositif expérimental a été développé, permettant d’imposer des perturbations à un film d’eau s’écoulant sur une feuille mince de titane, chauffée par effet Joule. Deux techniques de mesure non-intrusives, basées sur la technique de fluorescence induite par laser (LIF) à deux colo...</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><a id="b5363591abf634ea8b47b0bc9d8134e5" class="wp-workCard--action" rel="nofollow" data-click-track="profile-work-strip-download" data-download="{"attachment_id":91610140,"asset_id":87387662,"asset_type":"Work","button_location":"profile"}" href="https://www.academia.edu/attachments/91610140/download_file?st=MTczMjQ0NTY0OSw4LjIyMi4yMDguMTQ2&st=MTczMjQ0NTY0OSw4LjIyMi4yMDguMTQ2&s=profile"><span><i class="fa fa-arrow-down"></i></span><span>Download</span></a><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="87387662"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="87387662"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 87387662; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=87387662]").text(description); $(".js-view-count[data-work-id=87387662]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 87387662; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='87387662']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 87387662, container: "", }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-f77ea15d77ce96025a6048a514272ad8becbad23c641fc2b3bd6e24ca6ff1932.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (true){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "b5363591abf634ea8b47b0bc9d8134e5" } } $('.js-work-strip[data-work-id=87387662]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":87387662,"title":"Study of heat transfer inside of a wavy falling film by laser induced fluorescence techniques","translated_title":"","metadata":{"abstract":"Les films liquide minces à instabilités de surface sont utilisés dans de nombreuses applications industrielles comme promoteurs des transferts de chaleur et de masse, dans les échangeurs à plaques ou dans les colonnes de refroidissement de centrales nucléaires par exemple. Cependant, les mécanismes de l’intensification des transferts liés aux instabilités sont encore mal compris et les modèles ne permettent pas de rendre compte de l’ensemble des phénomènes physiques et de leurs couplages. Le but de ces travaux est d’étudier expérimentalement l’intensification des transferts de chaleur entre une paroi chauffée plane inclinée et le film liquide lorsqu’il est parcouru de vagues 2D à sa surface. Pour cela un dispositif expérimental a été développé, permettant d’imposer des perturbations à un film d’eau s’écoulant sur une feuille mince de titane, chauffée par effet Joule. Deux techniques de mesure non-intrusives, basées sur la technique de fluorescence induite par laser (LIF) à deux colo...","publication_date":{"day":20,"month":11,"year":2020,"errors":{}}},"translated_abstract":"Les films liquide minces à instabilités de surface sont utilisés dans de nombreuses applications industrielles comme promoteurs des transferts de chaleur et de masse, dans les échangeurs à plaques ou dans les colonnes de refroidissement de centrales nucléaires par exemple. Cependant, les mécanismes de l’intensification des transferts liés aux instabilités sont encore mal compris et les modèles ne permettent pas de rendre compte de l’ensemble des phénomènes physiques et de leurs couplages. Le but de ces travaux est d’étudier expérimentalement l’intensification des transferts de chaleur entre une paroi chauffée plane inclinée et le film liquide lorsqu’il est parcouru de vagues 2D à sa surface. Pour cela un dispositif expérimental a été développé, permettant d’imposer des perturbations à un film d’eau s’écoulant sur une feuille mince de titane, chauffée par effet Joule. Deux techniques de mesure non-intrusives, basées sur la technique de fluorescence induite par laser (LIF) à deux colo...","internal_url":"https://www.academia.edu/87387662/Study_of_heat_transfer_inside_of_a_wavy_falling_film_by_laser_induced_fluorescence_techniques","translated_internal_url":"","created_at":"2022-09-26T22:29:29.037-07:00","preview_url":null,"current_user_can_edit":null,"current_user_is_owner":null,"owner_id":15821148,"coauthors_can_edit":true,"document_type":"paper","co_author_tags":[],"downloadable_attachments":[{"id":91610140,"title":"","file_type":"pdf","scribd_thumbnail_url":"https://attachments.academia-assets.com/91610140/thumbnails/1.jpg","file_name":"document.pdf","download_url":"https://www.academia.edu/attachments/91610140/download_file?st=MTczMjQ0NTY0OSw4LjIyMi4yMDguMTQ2&st=MTczMjQ0NTY0OSw4LjIyMi4yMDguMTQ2&","bulk_download_file_name":"Study_of_heat_transfer_inside_of_a_wavy.pdf","bulk_download_url":"https://d1wqtxts1xzle7.cloudfront.net/91610140/document-libre.pdf?1664258259=\u0026response-content-disposition=attachment%3B+filename%3DStudy_of_heat_transfer_inside_of_a_wavy.pdf\u0026Expires=1732449249\u0026Signature=PWCP-61ej~Vw0y5dHpFIB65N~Ul5SpyGExrj-jaTjybnZyHAQEVH5AKqnrWGecEK3e6o2Beo0UPUPnF4tC8pVLMCX1BreMG350yLO~9JIQduExIBz88E1twAKIP-TJiydLHAUdgiGn5kDKwCYQOa6vjDR56F4zCByjYnC1XG4wdBIx5eCG0LonAeHk59JkrxbQJS0nNi0eCjrzQqc62ae8QSb8BmQ7va8yBD4qTL~W8Bxx2P8PXEzy02OIspwmUVRGXD3tvFKQ-Wp3xocRZx7reoDMHycmZmMecBSNYMzXeneQAO1~xmijN9A4tIaMee0srIW1wIBSRNbe3nPdcnTA__\u0026Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA"}],"slug":"Study_of_heat_transfer_inside_of_a_wavy_falling_film_by_laser_induced_fluorescence_techniques","translated_slug":"","page_count":163,"language":"fr","content_type":"Work","owner":{"id":15821148,"first_name":"Romain","middle_initials":null,"last_name":"Collignon","page_name":"RomainCollignon","domain_name":"independent","created_at":"2014-08-29T22:36:52.856-07:00","display_name":"Romain Collignon","url":"https://independent.academia.edu/RomainCollignon"},"attachments":[{"id":91610140,"title":"","file_type":"pdf","scribd_thumbnail_url":"https://attachments.academia-assets.com/91610140/thumbnails/1.jpg","file_name":"document.pdf","download_url":"https://www.academia.edu/attachments/91610140/download_file?st=MTczMjQ0NTY0OSw4LjIyMi4yMDguMTQ2&st=MTczMjQ0NTY0OSw4LjIyMi4yMDguMTQ2&","bulk_download_file_name":"Study_of_heat_transfer_inside_of_a_wavy.pdf","bulk_download_url":"https://d1wqtxts1xzle7.cloudfront.net/91610140/document-libre.pdf?1664258259=\u0026response-content-disposition=attachment%3B+filename%3DStudy_of_heat_transfer_inside_of_a_wavy.pdf\u0026Expires=1732449249\u0026Signature=PWCP-61ej~Vw0y5dHpFIB65N~Ul5SpyGExrj-jaTjybnZyHAQEVH5AKqnrWGecEK3e6o2Beo0UPUPnF4tC8pVLMCX1BreMG350yLO~9JIQduExIBz88E1twAKIP-TJiydLHAUdgiGn5kDKwCYQOa6vjDR56F4zCByjYnC1XG4wdBIx5eCG0LonAeHk59JkrxbQJS0nNi0eCjrzQqc62ae8QSb8BmQ7va8yBD4qTL~W8Bxx2P8PXEzy02OIspwmUVRGXD3tvFKQ-Wp3xocRZx7reoDMHycmZmMecBSNYMzXeneQAO1~xmijN9A4tIaMee0srIW1wIBSRNbe3nPdcnTA__\u0026Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA"}],"research_interests":[{"id":8067,"name":"Heat Transfer","url":"https://www.academia.edu/Documents/in/Heat_Transfer"},{"id":586236,"name":"LIF","url":"https://www.academia.edu/Documents/in/LIF"},{"id":3994319,"name":"Falling films","url":"https://www.academia.edu/Documents/in/Falling_films"}],"urls":[{"id":24216789,"url":"http://www.theses.fr/2020LORR0171/document"}]}, dispatcherData: dispatcherData }); $(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="87387660"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/87387660/LIF_measurements_resolved_in_time_of_temperature_and_thickness_of_a_liquid_film_with_surface_instability_flowing_down_an_inclined_surface"><img alt="Research paper thumbnail of LIF measurements resolved in time of temperature and thickness of a liquid film with surface instability flowing down an inclined surface" class="work-thumbnail" src="https://a.academia-assets.com/images/blank-paper.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/87387660/LIF_measurements_resolved_in_time_of_temperature_and_thickness_of_a_liquid_film_with_surface_instability_flowing_down_an_inclined_surface">LIF measurements resolved in time of temperature and thickness of a liquid film with surface instability flowing down an inclined surface</a></div><div class="wp-workCard_item"><span>OpenScience</span><span>, Jul 7, 2020</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="87387660"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="87387660"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 87387660; 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$(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="87387656"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/87387656/Etude_exp%C3%A9rimentale_du_transfert_de_chaleur_dans_des_films_liquides_ruisselants_instables"><img alt="Research paper thumbnail of Etude expérimentale du transfert de chaleur dans des films liquides ruisselants instables" class="work-thumbnail" src="https://a.academia-assets.com/images/blank-paper.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/87387656/Etude_exp%C3%A9rimentale_du_transfert_de_chaleur_dans_des_films_liquides_ruisselants_instables">Etude expérimentale du transfert de chaleur dans des films liquides ruisselants instables</a></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">Le ruissellement de films liquides minces est rencontré dans une variété de procédés, notamment l...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">Le ruissellement de films liquides minces est rencontré dans une variété de procédés, notamment les condenseurs, les évaporateurs ou encore les colonnes d&#39;absorption à film tombant. En général, les conditions rencontrées dans ces applications sont telles que la surface libre du film est instable et que des vagues s&#39;y propagent. Depuis longtemps, la présence des vagues est utilisée pour intensifier les transferts de chaleur et de masse à travers le film liquide. Cependant, les mécanismes à l&#39;origine de cette intensification ne sont pas toujours pas complètement élucidés, les couplages entre l&#39;hydrodynamique et la thermique rendant la modélisation complexe. L&#39;augmentation de la surface d&#39;échange entre le liquide et le gaz, la formation de rouleaux dans la crête des vagues, l&#39;amincissement du film devant le front de vague sont autant de phénomènes qui peuvent jouer un rôle important. Dans cette étude, le transfert de chaleur dans un film liquide mince qui s&...</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="87387656"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="87387656"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 87387656; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=87387656]").text(description); $(".js-view-count[data-work-id=87387656]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 87387656; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='87387656']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 87387656, container: "", }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-f77ea15d77ce96025a6048a514272ad8becbad23c641fc2b3bd6e24ca6ff1932.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (false){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "-1" } } $('.js-work-strip[data-work-id=87387656]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":87387656,"title":"Etude expérimentale du transfert de chaleur dans des films liquides ruisselants instables","translated_title":"","metadata":{"abstract":"Le ruissellement de films liquides minces est rencontré dans une variété de procédés, notamment les condenseurs, les évaporateurs ou encore les colonnes d\u0026#39;absorption à film tombant. En général, les conditions rencontrées dans ces applications sont telles que la surface libre du film est instable et que des vagues s\u0026#39;y propagent. Depuis longtemps, la présence des vagues est utilisée pour intensifier les transferts de chaleur et de masse à travers le film liquide. Cependant, les mécanismes à l\u0026#39;origine de cette intensification ne sont pas toujours pas complètement élucidés, les couplages entre l\u0026#39;hydrodynamique et la thermique rendant la modélisation complexe. L\u0026#39;augmentation de la surface d\u0026#39;échange entre le liquide et le gaz, la formation de rouleaux dans la crête des vagues, l\u0026#39;amincissement du film devant le front de vague sont autant de phénomènes qui peuvent jouer un rôle important. 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Dans cette étude, le transfert de chaleur dans un film liquide mince qui s\u0026...","internal_url":"https://www.academia.edu/87387656/Etude_exp%C3%A9rimentale_du_transfert_de_chaleur_dans_des_films_liquides_ruisselants_instables","translated_internal_url":"","created_at":"2022-09-26T22:29:28.121-07:00","preview_url":null,"current_user_can_edit":null,"current_user_is_owner":null,"owner_id":15821148,"coauthors_can_edit":true,"document_type":"paper","co_author_tags":[],"downloadable_attachments":[],"slug":"Etude_expérimentale_du_transfert_de_chaleur_dans_des_films_liquides_ruisselants_instables","translated_slug":"","page_count":null,"language":"fr","content_type":"Work","owner":{"id":15821148,"first_name":"Romain","middle_initials":null,"last_name":"Collignon","page_name":"RomainCollignon","domain_name":"independent","created_at":"2014-08-29T22:36:52.856-07:00","display_name":"Romain Collignon","url":"https://independent.academia.edu/RomainCollignon"},"attachments":[],"research_interests":[],"urls":[]}, dispatcherData: dispatcherData }); $(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="87387654"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/87387654/Drop_impact_in_the_regime_of_film_boiling_transient_evolution_of_the_heat_transfer_and_the_vapor_film_thickness"><img alt="Research paper thumbnail of Drop impact in the regime of film boiling : transient evolution of the heat transfer and the vapor film thickness" class="work-thumbnail" src="https://attachments.academia-assets.com/91610141/thumbnails/1.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/87387654/Drop_impact_in_the_regime_of_film_boiling_transient_evolution_of_the_heat_transfer_and_the_vapor_film_thickness">Drop impact in the regime of film boiling : transient evolution of the heat transfer and the vapor film thickness</a></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">When a drop impinges onto a wall heated above the Leidenfrost temperature, a very thin vapor film...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">When a drop impinges onto a wall heated above the Leidenfrost temperature, a very thin vapor film is formed at the interface between the liquid and the solid substrate. This vapor layer modifies the impact behavior of the drop and induces a significant decrease in heat transfer. To study this phenomenon, a model is proposed for the growth of the vapor film and the heat transfer at the impact. The main assumptions are: (i) a uniform but time varying thickness of the vapor film, (ii) a quasi-steady Poiseuille flow inside the vapor film, and (iii) a constant wall temperature. Heat energy and momentum balances are employed to obtain an ordinary differential equation describing the evolution of the vapor film thickness during the drop impact. Upon a one-dimensional analysis (nonetheless including some effects due to the complex fluid flow), the local heat flux transferred to the liquid qL can be evaluated. When the initial drop temperature is sufficiently lower than the saturation temper...</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><a id="f60d7256aad27ec4eb57796ebc564cbe" class="wp-workCard--action" rel="nofollow" data-click-track="profile-work-strip-download" data-download="{"attachment_id":91610141,"asset_id":87387654,"asset_type":"Work","button_location":"profile"}" href="https://www.academia.edu/attachments/91610141/download_file?st=MTczMjQ0NTY0OSw4LjIyMi4yMDguMTQ2&st=MTczMjQ0NTY0OSw4LjIyMi4yMDguMTQ2&s=profile"><span><i class="fa fa-arrow-down"></i></span><span>Download</span></a><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="87387654"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="87387654"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 87387654; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=87387654]").text(description); $(".js-view-count[data-work-id=87387654]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 87387654; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='87387654']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 87387654, container: "", }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-f77ea15d77ce96025a6048a514272ad8becbad23c641fc2b3bd6e24ca6ff1932.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (true){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "f60d7256aad27ec4eb57796ebc564cbe" } } $('.js-work-strip[data-work-id=87387654]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":87387654,"title":"Drop impact in the regime of film boiling : transient evolution of the heat transfer and the vapor film thickness","translated_title":"","metadata":{"abstract":"When a drop impinges onto a wall heated above the Leidenfrost temperature, a very thin vapor film is formed at the interface between the liquid and the solid substrate. This vapor layer modifies the impact behavior of the drop and induces a significant decrease in heat transfer. To study this phenomenon, a model is proposed for the growth of the vapor film and the heat transfer at the impact. The main assumptions are: (i) a uniform but time varying thickness of the vapor film, (ii) a quasi-steady Poiseuille flow inside the vapor film, and (iii) a constant wall temperature. Heat energy and momentum balances are employed to obtain an ordinary differential equation describing the evolution of the vapor film thickness during the drop impact. Upon a one-dimensional analysis (nonetheless including some effects due to the complex fluid flow), the local heat flux transferred to the liquid qL can be evaluated. 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$(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="87387651"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/87387651/Temperature_distribution_in_the_cross_section_of_wavy_and_falling_thin_liquid_films"><img alt="Research paper thumbnail of Temperature distribution in the cross section of wavy and falling thin liquid films" class="work-thumbnail" src="https://a.academia-assets.com/images/blank-paper.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/87387651/Temperature_distribution_in_the_cross_section_of_wavy_and_falling_thin_liquid_films">Temperature distribution in the cross section of wavy and falling thin liquid films</a></div><div class="wp-workCard_item"><span>Experiments in Fluids</span><span>, 2021</span></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">Wave instabilities of falling liquid films are crucial in many applications to enhance heat and m...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">Wave instabilities of falling liquid films are crucial in many applications to enhance heat and mass transfer. Despite the importance of this issue, the interplay between the heat transfer and the wavy dynamics of falling films is still not completely understood. To get more insight, a planar laser-induced fluorescence technique has been developed for imaging the temperature distribution in the cross section of thin liquid films (approximately 0.5–1 mm thick), which are falling down an inclined heated surface. This study reports on the implementation of this imaging technique. It also discusses its advantages and limitations for the investigation of the heat transfer in the falling liquid films. Two-dimensional flow conditions and regular waves are considered for the reconstruction of a complete temperature field in the waves. Measurements provide new understanding of the wave ability to generate mixing within the film. Temperature maps reveal preferential regions where mixing occurs first, before eventually spreading to the rest of the film if the wave amplitude and the travel distance are large enough. The increase in the heat transfer coefficient is directly related to the internal mixing observed in the temperature images.</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="87387651"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="87387651"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 87387651; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=87387651]").text(description); $(".js-view-count[data-work-id=87387651]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 87387651; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='87387651']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 87387651, container: "", }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-f77ea15d77ce96025a6048a514272ad8becbad23c641fc2b3bd6e24ca6ff1932.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (false){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "-1" } } $('.js-work-strip[data-work-id=87387651]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":87387651,"title":"Temperature distribution in the cross section of wavy and falling thin liquid films","translated_title":"","metadata":{"abstract":"Wave instabilities of falling liquid films are crucial in many applications to enhance heat and mass transfer. Despite the importance of this issue, the interplay between the heat transfer and the wavy dynamics of falling films is still not completely understood. To get more insight, a planar laser-induced fluorescence technique has been developed for imaging the temperature distribution in the cross section of thin liquid films (approximately 0.5–1 mm thick), which are falling down an inclined heated surface. This study reports on the implementation of this imaging technique. It also discusses its advantages and limitations for the investigation of the heat transfer in the falling liquid films. Two-dimensional flow conditions and regular waves are considered for the reconstruction of a complete temperature field in the waves. Measurements provide new understanding of the wave ability to generate mixing within the film. Temperature maps reveal preferential regions where mixing occurs first, before eventually spreading to the rest of the film if the wave amplitude and the travel distance are large enough. The increase in the heat transfer coefficient is directly related to the internal mixing observed in the temperature images.","publisher":"Springer Science and Business Media LLC","publication_date":{"day":null,"month":null,"year":2021,"errors":{}},"publication_name":"Experiments in Fluids"},"translated_abstract":"Wave instabilities of falling liquid films are crucial in many applications to enhance heat and mass transfer. Despite the importance of this issue, the interplay between the heat transfer and the wavy dynamics of falling films is still not completely understood. To get more insight, a planar laser-induced fluorescence technique has been developed for imaging the temperature distribution in the cross section of thin liquid films (approximately 0.5–1 mm thick), which are falling down an inclined heated surface. This study reports on the implementation of this imaging technique. It also discusses its advantages and limitations for the investigation of the heat transfer in the falling liquid films. Two-dimensional flow conditions and regular waves are considered for the reconstruction of a complete temperature field in the waves. Measurements provide new understanding of the wave ability to generate mixing within the film. Temperature maps reveal preferential regions where mixing occurs first, before eventually spreading to the rest of the film if the wave amplitude and the travel distance are large enough. The increase in the heat transfer coefficient is directly related to the internal mixing observed in the temperature images.","internal_url":"https://www.academia.edu/87387651/Temperature_distribution_in_the_cross_section_of_wavy_and_falling_thin_liquid_films","translated_internal_url":"","created_at":"2022-09-26T22:29:27.478-07:00","preview_url":null,"current_user_can_edit":null,"current_user_is_owner":null,"owner_id":15821148,"coauthors_can_edit":true,"document_type":"paper","co_author_tags":[],"downloadable_attachments":[],"slug":"Temperature_distribution_in_the_cross_section_of_wavy_and_falling_thin_liquid_films","translated_slug":"","page_count":null,"language":"en","content_type":"Work","owner":{"id":15821148,"first_name":"Romain","middle_initials":null,"last_name":"Collignon","page_name":"RomainCollignon","domain_name":"independent","created_at":"2014-08-29T22:36:52.856-07:00","display_name":"Romain Collignon","url":"https://independent.academia.edu/RomainCollignon"},"attachments":[],"research_interests":[{"id":60,"name":"Mechanical Engineering","url":"https://www.academia.edu/Documents/in/Mechanical_Engineering"},{"id":88,"name":"Aerospace Engineering","url":"https://www.academia.edu/Documents/in/Aerospace_Engineering"},{"id":511,"name":"Materials Science","url":"https://www.academia.edu/Documents/in/Materials_Science"},{"id":512,"name":"Mechanics","url":"https://www.academia.edu/Documents/in/Mechanics"},{"id":554780,"name":"Interdisciplinary Engineering","url":"https://www.academia.edu/Documents/in/Interdisciplinary_Engineering"}],"urls":[{"id":24216783,"url":"https://link.springer.com/content/pdf/10.1007/s00348-021-03175-x.pdf"}]}, dispatcherData: dispatcherData }); $(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="87387649"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/87387649/The_Leidenfrost_transition_of_liquid_droplets_impinging_onto_a_superheated_surface"><img alt="Research paper thumbnail of The Leidenfrost transition of liquid droplets impinging onto a superheated surface" class="work-thumbnail" src="https://attachments.academia-assets.com/91610133/thumbnails/1.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/87387649/The_Leidenfrost_transition_of_liquid_droplets_impinging_onto_a_superheated_surface">The Leidenfrost transition of liquid droplets impinging onto a superheated surface</a></div><div class="wp-workCard_item"><span>International Conference on Liquid Atomization and Spray Systems (ICLASS)</span><span>, 2021</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><a id="c90903bea37366127b4510005c7cc178" class="wp-workCard--action" rel="nofollow" data-click-track="profile-work-strip-download" data-download="{"attachment_id":91610133,"asset_id":87387649,"asset_type":"Work","button_location":"profile"}" href="https://www.academia.edu/attachments/91610133/download_file?st=MTczMjQ0NTY0OSw4LjIyMi4yMDguMTQ2&st=MTczMjQ0NTY0OSw4LjIyMi4yMDguMTQ2&s=profile"><span><i class="fa fa-arrow-down"></i></span><span>Download</span></a><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="87387649"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="87387649"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 87387649; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=87387649]").text(description); $(".js-view-count[data-work-id=87387649]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 87387649; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='87387649']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 87387649, container: "", }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-f77ea15d77ce96025a6048a514272ad8becbad23c641fc2b3bd6e24ca6ff1932.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (true){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); 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$(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="87387645"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/87387645/The_Leidenfrost_transition_of_water_droplets_impinging_onto_a_superheated_surface"><img alt="Research paper thumbnail of The Leidenfrost transition of water droplets impinging onto a superheated surface" class="work-thumbnail" src="https://a.academia-assets.com/images/blank-paper.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/87387645/The_Leidenfrost_transition_of_water_droplets_impinging_onto_a_superheated_surface">The Leidenfrost transition of water droplets impinging onto a superheated surface</a></div><div class="wp-workCard_item"><span>International Journal of Heat and Mass Transfer</span><span>, 2020</span></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">Abstract Water droplets impinge on a sapphire wall heated to a temperature ranging from 300∘C to ...</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">Abstract Water droplets impinge on a sapphire wall heated to a temperature ranging from 300∘C to 700∘C. Advanced measurement techniques are used to characterize the thermal processes associated with the drop impact. IR thermography, implemented by coating the impacted surface with an opaque and emissive material in the IR domain, makes it possible to measure the temperature of the solid surface during the impact process. Laser-induced fluorescence imaging is used to characterize the temperature field in the spreading droplet. At the onset of film boiling, the temperature distribution on the solid surface is marked by the formation of a fingering pattern. This latter corresponds to spatial fluctuations in the thickness of the vapor film. When a water droplet hits an overheated wall with a significant impact velocity, the thermal contact is so rapid and intense that the liquid temperature can largely overtake the saturation temperature and reach the spinodal temperature, i.e. the highest temperature at which water can exist in the liquid state. In this situation, experiments show that the dynamic Leidenfrost point is directly linked to the spinodal temperature. A superheating of the liquid by several hundred of ∘C and the subsequent homogeneous nucleation, have to be considered to describe the heat transfer in the film boiling regime.</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="87387645"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="87387645"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 87387645; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=87387645]").text(description); $(".js-view-count[data-work-id=87387645]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 87387645; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='87387645']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 87387645, container: "", }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-f77ea15d77ce96025a6048a514272ad8becbad23c641fc2b3bd6e24ca6ff1932.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (false){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "-1" } } $('.js-work-strip[data-work-id=87387645]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":87387645,"title":"The Leidenfrost transition of water droplets impinging onto a superheated surface","translated_title":"","metadata":{"abstract":"Abstract Water droplets impinge on a sapphire wall heated to a temperature ranging from 300∘C to 700∘C. Advanced measurement techniques are used to characterize the thermal processes associated with the drop impact. IR thermography, implemented by coating the impacted surface with an opaque and emissive material in the IR domain, makes it possible to measure the temperature of the solid surface during the impact process. Laser-induced fluorescence imaging is used to characterize the temperature field in the spreading droplet. At the onset of film boiling, the temperature distribution on the solid surface is marked by the formation of a fingering pattern. This latter corresponds to spatial fluctuations in the thickness of the vapor film. When a water droplet hits an overheated wall with a significant impact velocity, the thermal contact is so rapid and intense that the liquid temperature can largely overtake the saturation temperature and reach the spinodal temperature, i.e. the highest temperature at which water can exist in the liquid state. In this situation, experiments show that the dynamic Leidenfrost point is directly linked to the spinodal temperature. A superheating of the liquid by several hundred of ∘C and the subsequent homogeneous nucleation, have to be considered to describe the heat transfer in the film boiling regime.","publisher":"Elsevier BV","publication_date":{"day":null,"month":null,"year":2020,"errors":{}},"publication_name":"International Journal of Heat and Mass Transfer"},"translated_abstract":"Abstract Water droplets impinge on a sapphire wall heated to a temperature ranging from 300∘C to 700∘C. Advanced measurement techniques are used to characterize the thermal processes associated with the drop impact. IR thermography, implemented by coating the impacted surface with an opaque and emissive material in the IR domain, makes it possible to measure the temperature of the solid surface during the impact process. Laser-induced fluorescence imaging is used to characterize the temperature field in the spreading droplet. At the onset of film boiling, the temperature distribution on the solid surface is marked by the formation of a fingering pattern. This latter corresponds to spatial fluctuations in the thickness of the vapor film. When a water droplet hits an overheated wall with a significant impact velocity, the thermal contact is so rapid and intense that the liquid temperature can largely overtake the saturation temperature and reach the spinodal temperature, i.e. the highest temperature at which water can exist in the liquid state. In this situation, experiments show that the dynamic Leidenfrost point is directly linked to the spinodal temperature. A superheating of the liquid by several hundred of ∘C and the subsequent homogeneous nucleation, have to be considered to describe the heat transfer in the film boiling regime.","internal_url":"https://www.academia.edu/87387645/The_Leidenfrost_transition_of_water_droplets_impinging_onto_a_superheated_surface","translated_internal_url":"","created_at":"2022-09-26T22:29:26.874-07:00","preview_url":null,"current_user_can_edit":null,"current_user_is_owner":null,"owner_id":15821148,"coauthors_can_edit":true,"document_type":"paper","co_author_tags":[],"downloadable_attachments":[],"slug":"The_Leidenfrost_transition_of_water_droplets_impinging_onto_a_superheated_surface","translated_slug":"","page_count":null,"language":"en","content_type":"Work","owner":{"id":15821148,"first_name":"Romain","middle_initials":null,"last_name":"Collignon","page_name":"RomainCollignon","domain_name":"independent","created_at":"2014-08-29T22:36:52.856-07:00","display_name":"Romain Collignon","url":"https://independent.academia.edu/RomainCollignon"},"attachments":[],"research_interests":[{"id":48,"name":"Engineering","url":"https://www.academia.edu/Documents/in/Engineering"},{"id":511,"name":"Materials Science","url":"https://www.academia.edu/Documents/in/Materials_Science"},{"id":522,"name":"Thermodynamics","url":"https://www.academia.edu/Documents/in/Thermodynamics"},{"id":33661,"name":"Heat and Mass Transfer","url":"https://www.academia.edu/Documents/in/Heat_and_Mass_Transfer"},{"id":80414,"name":"Mathematical Sciences","url":"https://www.academia.edu/Documents/in/Mathematical_Sciences"},{"id":118582,"name":"Physical sciences","url":"https://www.academia.edu/Documents/in/Physical_sciences"},{"id":2489916,"name":"Superheating","url":"https://www.academia.edu/Documents/in/Superheating"}],"urls":[{"id":24216780,"url":"https://api.elsevier.com/content/article/PII:S0017931020330623?httpAccept=text/xml"}]}, dispatcherData: dispatcherData }); 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$(this).data('initialized', true); } }); $a.trackClickSource(".js-work-strip-work-link", "profile_work_strip") }); </script> <div class="js-work-strip profile--work_container" data-work-id="87387619"><div class="profile--work_thumbnail hidden-xs"><a class="js-work-strip-work-link" data-click-track="profile-work-strip-thumbnail" href="https://www.academia.edu/87387619/Temporally_resolved_PLIF_measurements_of_the_temperature_inside_droplets_impinging_on_a_hot_solid_surface"><img alt="Research paper thumbnail of Temporally resolved PLIF measurements of the temperature inside droplets impinging on a hot solid surface" class="work-thumbnail" src="https://attachments.academia-assets.com/91610112/thumbnails/1.jpg" /></a></div><div class="wp-workCard wp-workCard_itemContainer"><div class="wp-workCard_item wp-workCard--title"><a class="js-work-strip-work-link text-gray-darker" data-click-track="profile-work-strip-title" href="https://www.academia.edu/87387619/Temporally_resolved_PLIF_measurements_of_the_temperature_inside_droplets_impinging_on_a_hot_solid_surface">Temporally resolved PLIF measurements of the temperature inside droplets impinging on a hot solid surface</a></div><div class="wp-workCard_item"><span class="js-work-more-abstract-truncated">Heat transfers at the impact of a droplet on a hot solid surface are investigated experimentally....</span><a class="js-work-more-abstract" data-broccoli-component="work_strip.more_abstract" data-click-track="profile-work-strip-more-abstract" href="javascript:;"><span> more </span><span><i class="fa fa-caret-down"></i></span></a><span class="js-work-more-abstract-untruncated hidden">Heat transfers at the impact of a droplet on a hot solid surface are investigated experimentally. Millimeter-sized droplets impinge a heated flat sapphire window. The time evolution of the droplet temperature is characterized using the two-color laser-induced fluorescence technique. For that, a Q-switched Nd:YAG laser is used for the excitation of the fluorescence in order to obtain instantaneous images of the droplet temperature. The fluid under investigation is seeded with two fluorescent dyes, one sensitive to temperature (fluorescein disodium) and the other not (sulforhodamine 640). Owing to a wavelength shift between the dyes&#39; emissions, the fluorescence signal of the dyes can be detected separately by two cameras. The liquid temperature is determined with a good accuracy by doing the ratio of the images of the dyes&#39; fluorescence. A critical feature of the method is that the image ratio is not disturbed by the deformation of the impacting droplet, which affects the sign...</span></div><div class="wp-workCard_item wp-workCard--actions"><span class="work-strip-bookmark-button-container"></span><a id="74c73a0d67a73a71ebd81decaeb3ab70" class="wp-workCard--action" rel="nofollow" data-click-track="profile-work-strip-download" data-download="{"attachment_id":91610112,"asset_id":87387619,"asset_type":"Work","button_location":"profile"}" href="https://www.academia.edu/attachments/91610112/download_file?st=MTczMjQ0NTY0OSw4LjIyMi4yMDguMTQ2&st=MTczMjQ0NTY0OSw4LjIyMi4yMDguMTQ2&s=profile"><span><i class="fa fa-arrow-down"></i></span><span>Download</span></a><span class="wp-workCard--action visible-if-viewed-by-owner inline-block" style="display: none;"><span class="js-profile-work-strip-edit-button-wrapper profile-work-strip-edit-button-wrapper" data-work-id="87387619"><a class="js-profile-work-strip-edit-button" tabindex="0"><span><i class="fa fa-pencil"></i></span><span>Edit</span></a></span></span><span id="work-strip-rankings-button-container"></span></div><div class="wp-workCard_item wp-workCard--stats"><span><span><span class="js-view-count view-count u-mr2x" data-work-id="87387619"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 87387619; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=87387619]").text(description); $(".js-view-count[data-work-id=87387619]").attr('title', description).tooltip(); }); });</script></span></span><span><span class="percentile-widget hidden"><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 87387619; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-work-strip[data-work-id='87387619']"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></span><span><script>$(function() { new Works.PaperRankView({ workId: 87387619, container: "", }); });</script></span></div><div id="work-strip-premium-row-container"></div></div></div><script> require.config({ waitSeconds: 90 })(["https://a.academia-assets.com/assets/wow_profile-f77ea15d77ce96025a6048a514272ad8becbad23c641fc2b3bd6e24ca6ff1932.js","https://a.academia-assets.com/assets/work_edit-ad038b8c047c1a8d4fa01b402d530ff93c45fee2137a149a4a5398bc8ad67560.js"], function() { // from javascript_helper.rb var dispatcherData = {} if (true){ window.WowProfile.dispatcher = window.WowProfile.dispatcher || _.clone(Backbone.Events); dispatcherData = { dispatcher: window.WowProfile.dispatcher, downloadLinkId: "74c73a0d67a73a71ebd81decaeb3ab70" } } $('.js-work-strip[data-work-id=87387619]').each(function() { if (!$(this).data('initialized')) { new WowProfile.WorkStripView({ el: this, workJSON: {"id":87387619,"title":"Temporally resolved PLIF measurements of the temperature inside droplets impinging on a hot solid surface","translated_title":"","metadata":{"abstract":"Heat transfers at the impact of a droplet on a hot solid surface are investigated experimentally. 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