Numerical and Geometrical Analysis of the Onshore Oscillating Water Column Wave Energy with a Ramp

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Filali; citation_volume=1; citation_issue=04; citation_publication_date=2006/4; citation_pages=350-355; citation_doi=10.24084/repqj04.452" /> <meta name="citation_reference" content="citation_title=Modeling and optimization of the chamber of OWC system; citation_author=Nader Dizadji; citation_author=Seyed Ehsan Sajadian; citation_volume=36; citation_issue=5; citation_publication_date=2011/5; citation_pages=2360-2366; citation_doi=10.1016/j.energy.2011.01.010" /> <meta name="citation_reference" content="Ferziger, J. H., & Peric, M. (1996). Computacional Methods for Fluid Dynamics (1st ed.). Berlim: Springer." /> <meta name="person" content="Marla Rodrigues Oliveira, Elizaldo Domingues dos Santos, Liércio André Isoldi, Luiz Alberto Oliveira Rocha, Mateus das Neves Gomes" /> <meta name="description" content="This study is about a two-dimensional numerical analysis of the influence of a ramp in front on an oscillating water column wave energy converter (OWC-WEC). The main purpose was to evaluate, numerically and geometrically, the effect of using a ramp variation in relation to the frontal wall on the hydropneumatic power of the OWC-WEC. The constructal design method was applied for geometric analysis. The problem had a geometric constraint: the area of the ramp (A2) and two degrees of freedom: H2 / L2 (ratio of the height and length of the ramp) and L4 (the distance of the ramp concerning the OWC-WEC front wall). In numerical simulations, the equations of conservation of mass, momentum, and an equation for the transport of volumetric fraction were solved using the finite volume method (FVM). The multiphase model volume of fluid (VOF) was applied for the air-water interaction. Thus, the increase in the H2/L2 ratio resulted in a decrease of the root mean square (RMS) of the available hydropneumatic power (Phyd). By varying the distance L4, the better case was = 6 m and / = 0.025 and the worst case was = 1 m and / = 0.2. The relative difference between the better RMS Phyd = 150.7957 W and the worst Phyd = 73.1164 W reached up to a hundred and six percent." /> <meta name="keywords" content="Constructal Design, Oscillating Water Column, Ramp, Volume of Fluid" /> <meta name="copyright" content="2021 Trans Tech Publications Ltd. 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id="paperDownloadsAndVisitorsCount"></span> </div> </div> <div class="clearfix"></div> <div class="page-paper-title"> <div class="preview-block"> <img alt="Article Preview" width="128" height="180" src="/DDF.412.11/thumbnail.gif"> <div id="preview-button" data-url-preview-log="/Paper/PreviewImageLog?paperId=583590"> <i class="inline-icon preview-icon"></i> </div>  <div id="paper-preview-modal" class="modal fade"> <div class="modal-dialog" role="document"> <div class="popup-page-name underline-begin"> <div class="page-name-block-text">Article Preview</div> </div> <img alt="Article Preview" class="preview-image lazyload" data-src="/DDF.412.11/preview.gif"> <a data-dismiss="modal" title="Close" class="inline-icon close-icon"></a> </div> </div>  </div> <div class="abstract-block-description"> <h3 class="page-paper-first-header">Abstract:</h3> <p class="normal-text"> This study is about a two-dimensional numerical analysis of the influence of a ramp in front on an oscillating water column wave energy converter (OWC-WEC). The main purpose was to evaluate, numerically and geometrically, the effect of using a ramp variation in relation to the frontal wall on the hydropneumatic power of the OWC-WEC. The constructal design method was applied for geometric analysis. The problem had a geometric constraint: the area of the ramp (<i>A</i><sub>2</sub>) and two degrees of freedom: <i>H</i><sub>2</sub> / <i>L</i><sub>2</sub> (ratio of the height and length of the ramp) and <i>L</i><sub>4 </sub>(the distance of the ramp concerning the OWC-WEC front wall). In numerical simulations, the equations of conservation of mass, momentum, and an equation for the transport of volumetric fraction were solved using the finite volume method (FVM). The multiphase model volume of fluid (VOF) was applied for the air-water interaction. Thus, the increase in the <i>H</i><sub>2</sub>/<i>L</i><sub>2 </sub>ratio resulted in a decrease of the root mean square (RMS) of the available hydropneumatic power (<i>P</i><sub>hyd</sub>). By varying the distance <i>L</i><sub>4</sub>, the better case was = 6 m and / = 0.025 and the worst case was = 1 m and / = 0.2. The relative difference between the better RMS <i>P</i><sub>hyd</sub> = 150.7957 W and the worst <i>P</i><sub>hyd</sub> = 73.1164 W reached up to a hundred and six percent. </p> </div> <div class="paper-access-buttons col-xs-12"> <div class="row"> <div class="sa-button-wrap"> <a id="sa-button" class="wayfinder-login d-flex sa-button" href="javascript:;"> <div class="sa-button-logo-wrap"> <i class="inline-icon sa-white"></i> </div> <div class="d-flex justify-content-center align-items-center sa-button-text text-truncate"> <div class="sa-button-text-primary text-truncate">Access through your institution</div> </div> </a> </div> <div class="title-button-pdf"> <button id="readPaperButton" data-url-read-paper-log="/Paper/ReadThePaperLog?paperId=583590" class="button button-160"> <span class="inline-element">Read The Paper</span> </button> </div> </div> <div class="row"> </div> </div> <div class="clearfix"></div> <div class="connected-title-container"> <div class="connected-title-text 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Numerical and Geometrical Analysis of the Onshore Oscillating Water Column Wave Energy with a Ramp | Scientific.Net