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hydrodynamic</title> <meta name="description" content="Search results for: thermal and hydrodynamic"> <meta name="keywords" content="thermal and hydrodynamic"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="thermal and hydrodynamic"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 3837</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: thermal and hydrodynamic</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3837</span> Design an Expert System to Assess the Hydraulic System in Thermal and Hydrodynamic Aspect</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20Abdul-Razzak%20Aboudi%20Al-Issa">Ahmad Abdul-Razzak Aboudi Al-Issa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Thermal and Hydrodynamic are basic aspects in any hydraulic system and therefore, they must be assessed with regard to this aspect before constructing the system. This assessment needs a good expertise in this aspect to obtain an efficient hydraulic system. Therefore, this study aims to build an expert system called Hydraulic System Calculations (HSC) to ensure a smooth operation for the hydraulic system. The expert system (HSC) had been designed and coded in an user-friendly interactive program called Microsoft Visual Basic 2010. The suggested code provides the designer with a number of choices to resolve the problem of hydraulic oil overheating which may arise during the continuous operation of the hydraulic unit. As a result, the HSC can minimize the human errors, effort, time and cost of hydraulic machine design. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fluid%20power" title="fluid power">fluid power</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20system" title=" hydraulic system"> hydraulic system</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20and%20hydrodynamic" title=" thermal and hydrodynamic"> thermal and hydrodynamic</a>, <a href="https://publications.waset.org/abstracts/search?q=expert%20system" title=" expert system"> expert system</a> </p> <a href="https://publications.waset.org/abstracts/4076/design-an-expert-system-to-assess-the-hydraulic-system-in-thermal-and-hydrodynamic-aspect" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/4076.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">446</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3836</span> Performance Study of Scraped Surface Heat Exchanger with Helical Ribbons</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Ali">S. Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Baccar"> M. Baccar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, numerical simulations were carried out using a specific CFD code in order to study the performance of an innovative Scraped Surface Heat Exchanger (SSHE) with helical ribbons for Bingham fluids (threshold fluids). The resolution of three-dimensional form of the conservation equations (continuity, momentum and energy equations) was carried out basing on the finite volume method (FVM). After studying the effect of dimensionless numbers (axial Reynolds, rotational Reynolds and Oldroyd numbers) on the hydrodynamic and thermal behaviors within SSHE, a parametric study was developed, by varying the width of the helical ribbon, the clearance between the stator wall and the tip of the ribbon and the number of turns of the helical ribbon, in order to improve the heat transfer inside the exchanger. The effect of these geometrical numbers on the hydrodynamic and thermal behaviors was discussed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heat%20transfer" title="heat transfer">heat transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=helical%20ribbons" title=" helical ribbons"> helical ribbons</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrodynamic%20behavior" title=" hydrodynamic behavior"> hydrodynamic behavior</a>, <a href="https://publications.waset.org/abstracts/search?q=parametric%20study" title=" parametric study"> parametric study</a>, <a href="https://publications.waset.org/abstracts/search?q=SSHE" title=" SSHE"> SSHE</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20behavior" title=" thermal behavior"> thermal behavior</a> </p> <a href="https://publications.waset.org/abstracts/59515/performance-study-of-scraped-surface-heat-exchanger-with-helical-ribbons" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/59515.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">214</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3835</span> Numerical investigation of Hydrodynamic and Parietal Heat Transfer to Bingham Fluid Agitated in a Vessel by Helical Ribbon Impeller</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mounir%20Baccar">Mounir Baccar</a>, <a href="https://publications.waset.org/abstracts/search?q=Amel%20Gammoudi"> Amel Gammoudi</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelhak%20Ayadi"> Abdelhak Ayadi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The efficient mixing of highly viscous fluids is required for many industries such as food, polymers or paints production. The homogeneity is a challenging operation for this fluids type since they operate at low Reynolds number to reduce the required power of the used impellers. Particularly, close-clearance impellers, mainly helical ribbons, are chosen for highly viscous fluids agitated in laminar regime which is currently heated through vessel wall. Indeed, they are characterized by high shear strains closer to the vessel wall, which causes a disturbing thermal boundary layer and ensures the homogenization of the bulk volume by axial and radial vortices. The hydrodynamic and thermal behaviors of Newtonian fluids in vessels agitated by helical ribbon impellers, has been mostly studied by many researchers. However, rarely researchers investigated numerically the agitation of yield stress fluid by means of helical ribbon impellers. This paper aims to study the effect of the Double Helical Ribbon (DHR) stirrers on both the hydrodynamic and the thermal behaviors of yield stress fluids treated in a cylindrical vessel by means of numerical simulation approach. For this purpose, continuity, momentum, and thermal equations were solved by means of 3D finite volume technique. The effect of Oldroyd (Od) and Reynolds (Re) numbers on the power (Po) and Nusselt (Nu) numbers for the mentioned stirrer type have been studied. Also, the velocity and thermal fields, the dissipation function and the apparent viscosity have been presented in different (r-z) and (r-胃) planes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bingham%20fluid" title="Bingham fluid">Bingham fluid</a>, <a href="https://publications.waset.org/abstracts/search?q=Hydrodynamic%20and%20thermal%20behavior" title=" Hydrodynamic and thermal behavior"> Hydrodynamic and thermal behavior</a>, <a href="https://publications.waset.org/abstracts/search?q=helical%20ribbon" title=" helical ribbon"> helical ribbon</a>, <a href="https://publications.waset.org/abstracts/search?q=mixing" title=" mixing"> mixing</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20modelling" title=" numerical modelling"> numerical modelling</a> </p> <a href="https://publications.waset.org/abstracts/57711/numerical-investigation-of-hydrodynamic-and-parietal-heat-transfer-to-bingham-fluid-agitated-in-a-vessel-by-helical-ribbon-impeller" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/57711.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">306</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3834</span> Software Tool Design for Heavy Oil Upgrading by Hydrogen Donor Addition in a Hydrodynamic Cavitation Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Munoz%20A.%20Tatiana">Munoz A. Tatiana</a>, <a href="https://publications.waset.org/abstracts/search?q=Solano%20R.%20Brandon"> Solano R. Brandon</a>, <a href="https://publications.waset.org/abstracts/search?q=Montes%20C.%20Juan"> Montes C. Juan</a>, <a href="https://publications.waset.org/abstracts/search?q=Cierco%20G.%20Javier"> Cierco G. Javier</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The hydrodynamic cavitation is a process in which the energy that the fluids have in the phase changes is used. From this energy, local temperatures greater than 5000 掳C are obtained where thermal cracking of the fluid molecules takes place. The process applied to heavy oil affects variables such as viscosity, density, and composition, which constitutes an important improvement in the quality of crude oil. In this study, the need to design a software through mathematical integration models of mixing, cavitation, kinetics, and reactor, allows modeling changes in density, viscosity, and composition of a heavy oil crude, when the fluid passes through a hydrodynamic cavitation reactor. In order to evaluate the viability of this technique in the industry, a heavy oil of 18掳 API gravity, was simulated using naphtha as a hydrogen donor at concentrations of 1, 2 and 5% vol, where the simulation results showed an API gravity increase to 0.77, 1.21 and 1.93掳 respectively and a reduction viscosity by 9.9, 12.9 and 15.8%. The obtained results allow to have a favorable panorama on this technological development, an appropriate visualization on the generation of innovative knowledge of this technique and the technical-economic opportunity that benefits the development of the hydrocarbon sector related to heavy crude oil that includes the largest world oil production. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hydrodynamic%20cavitation" title="hydrodynamic cavitation">hydrodynamic cavitation</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20cracking" title=" thermal cracking"> thermal cracking</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrogen%20donor" title=" hydrogen donor"> hydrogen donor</a>, <a href="https://publications.waset.org/abstracts/search?q=heavy%20oil%20upgrading" title=" heavy oil upgrading"> heavy oil upgrading</a>, <a href="https://publications.waset.org/abstracts/search?q=simulator" title=" simulator"> simulator</a> </p> <a href="https://publications.waset.org/abstracts/103267/software-tool-design-for-heavy-oil-upgrading-by-hydrogen-donor-addition-in-a-hydrodynamic-cavitation-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/103267.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">150</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3833</span> The Thermal Simulation of Hydraulic Cable Drum Trailers 15-Ton</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20Abdul-Razzak%20Aboudi%20Al-Issa">Ahmad Abdul-Razzak Aboudi Al-Issa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Thermal is the main important aspect in any hydraulic system since it is affected on the hydraulic system performance. Therefore must be simulated the hydraulic system -that was designed- in this aspect before constructing it. In this study, an existed expert system was using to simulate the thermal aspect of a designed hydraulic system that will be used in an industrial field. The expert system which is used in this study is (Hydraulic System Calculations), and its symbol (HSC). HSC had been designed and coded in an interactive program userfriendly named (Microsoft Visual Basic 2010). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fluid%20power" title="fluid power">fluid power</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20system" title=" hydraulic system"> hydraulic system</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20and%20hydrodynamic" title=" thermal and hydrodynamic"> thermal and hydrodynamic</a>, <a href="https://publications.waset.org/abstracts/search?q=expert%20system" title=" expert system"> expert system</a> </p> <a href="https://publications.waset.org/abstracts/17006/the-thermal-simulation-of-hydraulic-cable-drum-trailers-15-ton" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17006.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">500</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3832</span> Study on Moisture-Induced-Damage of Semi-Rigid Base under Hydrodynamic Pressure</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Baofeng%20Pan">Baofeng Pan</a>, <a href="https://publications.waset.org/abstracts/search?q=Heng%20Liu"> Heng Liu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Because of the high strength and large carrying capacity, the semi-rigid base is widely used in modern road engineering. However, hydrodynamic pressure, which is one of the main factors to cause early damage of semi-rigid base, cannot be avoided in the nature environment when pavement is subjected to some loadings such as the passing vehicles. In order to investigating how moisture-induced-damage of semi-rigid base influenced by hydrodynamic pressure, a new and effective experimental research method is provided in this paper. The results show that: (a) The washing action of high hydrodynamic pressure is the direct cause of strength reducing of road semi-rigid base. (b) The damage of high hydrodynamic pressure mainly occurs at the beginning of the scoring test and with the increasing of testing time the influence reduces. (c) Under the same hydrodynamic pressure, the longer the specimen health age, the stronger ability to resist moisture induced damage. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=semi-rigid%20base" title="semi-rigid base">semi-rigid base</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrodynamic%20pressure" title=" hydrodynamic pressure"> hydrodynamic pressure</a>, <a href="https://publications.waset.org/abstracts/search?q=moisture-induced-damage" title=" moisture-induced-damage"> moisture-induced-damage</a>, <a href="https://publications.waset.org/abstracts/search?q=experimental%20research" title=" experimental research"> experimental research</a> </p> <a href="https://publications.waset.org/abstracts/29849/study-on-moisture-induced-damage-of-semi-rigid-base-under-hydrodynamic-pressure" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/29849.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">318</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3831</span> Hydrodynamic Analysis with Heat Transfer in Solid Gas Fluidized Bed Reactor for Solar Thermal Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sam%20Rasoulzadeh">Sam Rasoulzadeh</a>, <a href="https://publications.waset.org/abstracts/search?q=Atefeh%20Mousavi"> Atefeh Mousavi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Fluidized bed reactors are known as highly exothermic and endothermic according to uniformity in temperature as a safe and effective mean for catalytic reactors. In these reactors, a wide range of catalyst particles can be used and by using a continuous operation proceed to produce in succession. Providing optimal conditions for the operation of these types of reactors will prevent the exorbitant costs necessary to carry out laboratory work. In this regard, a hydrodynamic analysis was carried out with heat transfer in the solid-gas fluidized bed reactor for solar thermal applications. The results showed that in the fluid flow the input of the reactor has a lower temperature than the outlet, and when the fluid is passing from the reactor, the heat transfer happens between cylinder and solar panel and fluid. It increases the fluid temperature in the outlet pump and also the kinetic energy of the fluid has been raised in the outlet areas. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heat%20transfer" title="heat transfer">heat transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20reactor" title=" solar reactor"> solar reactor</a>, <a href="https://publications.waset.org/abstracts/search?q=fluidized%20bed%20reactor" title=" fluidized bed reactor"> fluidized bed reactor</a>, <a href="https://publications.waset.org/abstracts/search?q=CFD" title=" CFD"> CFD</a>, <a href="https://publications.waset.org/abstracts/search?q=computational%20fluid%20dynamics" title=" computational fluid dynamics"> computational fluid dynamics</a> </p> <a href="https://publications.waset.org/abstracts/100498/hydrodynamic-analysis-with-heat-transfer-in-solid-gas-fluidized-bed-reactor-for-solar-thermal-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/100498.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">180</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3830</span> Hydrodynamic Analysis of Journal Bearing Operating With Nanolubricants </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=R.%20Hariprakash">R. Hariprakash</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Prabhakaran%20Nair"> K. Prabhakaran Nair</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, the static and dynamic characteristics of hydrodynamic journal bearings operating under nano lubricants are presented. Hydrodynamic journal bearings are used in turbo machines of power plants to support heavy load. In power plants, bearings are getting failure because of its inability to support the heavy load due to various reasons. Failures of bearings make the power plant to be shutdown. The load carrying capacity of journal bearing mainly depends upon the viscosity of the lubricants. The addition of nano particles on commercially available lubricant may enhance the viscosity of lubricant and in turn, change the performance characteristics. In the literature, though many studies have been carried out for the hydrodynamic bearing operating under Newtonian and non-Newtonian lubricants, studies on hydrodynamic bearings operating under nano lubricants is scarce. Thus, it is felt that there is a need to recompute the performance characteristics of journal bearings operating under nano lubricants. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hydrodynamic" title="hydrodynamic">hydrodynamic</a>, <a href="https://publications.waset.org/abstracts/search?q=journal" title=" journal"> journal</a>, <a href="https://publications.waset.org/abstracts/search?q=bearing" title=" bearing"> bearing</a>, <a href="https://publications.waset.org/abstracts/search?q=analysis" title=" analysis"> analysis</a> </p> <a href="https://publications.waset.org/abstracts/2859/hydrodynamic-analysis-of-journal-bearing-operating-with-nanolubricants" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2859.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">433</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3829</span> 3-D Numerical Simulation of Scraped Surface Heat Exchanger with Helical Screw</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rabeb%20Triki">Rabeb Triki</a>, <a href="https://publications.waset.org/abstracts/search?q=Hassene%20Djemel"> Hassene Djemel</a>, <a href="https://publications.waset.org/abstracts/search?q=Mounir%20Baccar"> Mounir Baccar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Surface scraping is a passive heat transfer enhancement technique that is directly used in scraped surface heat exchanger (SSHE). The scraping action prevents the accumulation of the product on the inner wall, which intensifies the heat transfer and avoids the formation of dead zones. SSHEs are widely used in industry for several applications such as crystallization, sterilization, freezing, gelatinization, and many other continuous processes. They are designed to deal with products that are viscous, sticky or that contain particulate matter. This research work presents a three-dimensional numerical simulation of the coupled thermal and hydrodynamic behavior within a SSHE which includes Archimedes’ screw instead of scraper blades. The finite volume Fluent 15.0 was used to solve continuity, momentum and energy equations using multiple reference frame formulation. The process fluid investigated under this study is the pure glycerin. Different geometrical parameters were studied in the case of steady, non-isothermal, laminar flow. In particular, attention is focused on the effect of the conicity of the rotor and the pitch of Archimedes’ screw on temperature and velocity distribution and heat transfer rate. Numerical investigations show that the increase of the number of turns in the screw from five to seven turns leads to amelioration of heat transfer coefficient, and the increase of the conicity of the rotor from 0.1 to 0.15 leads to an increase in the rate of heat transfer. Further studies should investigate the effect of different operating parameters (axial and rotational Reynolds number) on the hydrodynamic and thermal behavior of the SSHE. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ANSYS-Fluent" title="ANSYS-Fluent">ANSYS-Fluent</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrodynamic%20behavior" title=" hydrodynamic behavior"> hydrodynamic behavior</a>, <a href="https://publications.waset.org/abstracts/search?q=scraped%20surface%20heat%20exchange" title=" scraped surface heat exchange"> scraped surface heat exchange</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20behavior" title=" thermal behavior"> thermal behavior</a> </p> <a href="https://publications.waset.org/abstracts/91228/3-d-numerical-simulation-of-scraped-surface-heat-exchanger-with-helical-screw" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/91228.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">160</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3828</span> The Effects of a Thin Liquid Layer on the Hydrodynamic Machine Rotor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jaroslav%20Krutil">Jaroslav Krutil</a>, <a href="https://publications.waset.org/abstracts/search?q=Franti%C5%A1ek%20Pochyl%C3%BD"> Franti拧ek Pochyl媒</a>, <a href="https://publications.waset.org/abstracts/search?q=Simona%20Fialov%C3%A1"> Simona Fialov谩</a>, <a href="https://publications.waset.org/abstracts/search?q=Vladim%C3%ADr%20Hab%C3%A1n"> Vladim铆r Hab谩n</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A mathematical model of the additional effects of the liquid in the hydrodynamic gap is presented in the paper. An in-compressible viscous fluid is considered. Based on computational modeling are determined the matrices of mass, stiffness and damping. The mathematical model is experimentally verified. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=computational%20modeling" title="computational modeling">computational modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=mathematical%20model" title=" mathematical model"> mathematical model</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrodynamic%20gap" title=" hydrodynamic gap"> hydrodynamic gap</a>, <a href="https://publications.waset.org/abstracts/search?q=matrices%20of%20mass" title=" matrices of mass"> matrices of mass</a>, <a href="https://publications.waset.org/abstracts/search?q=stiffness%20and%20damping" title=" stiffness and damping"> stiffness and damping</a> </p> <a href="https://publications.waset.org/abstracts/22442/the-effects-of-a-thin-liquid-layer-on-the-hydrodynamic-machine-rotor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22442.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">557</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3827</span> Effects of X and + Tail-Body Configurations on Hydrodynamic Performance and Stability of an Underwater Vehicle</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kadri%20Ko%C3%A7er">Kadri Ko莽er</a>, <a href="https://publications.waset.org/abstracts/search?q=Sezer%20Kefeli"> Sezer Kefeli</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper proposes a comparison of hydrodynamic performance and stability characteristic for an underwater vehicle which has two type of tail design, namely X and +tail-body configurations. The effects of these configurations on the underwater vehicle鈥檚 hydrodynamic performance and maneuvering characteristic will be investigated comprehensively. Hydrodynamic damping coefficients for modeling the motion of the underwater vehicles will be predicted. Additionally, forces and moments due to control surfaces will be compared using computational fluid dynamics methods. In the aviation, the X tail-body configuration is widely used for high maneuverability requirements. However, in the underwater, the + tail-body configuration is more commonly used than the X tail-body configuration for its stability characteristics. Thus it is important to see the effect and differences of the tail designs in the underwater world. For CFD analysis, the incompressible, three-dimensional, and steady Navier-Stokes equations will be used to simulate the flows. Also, k-蔚 Realizable turbulence model with enhanced wall treatment will be taken. Numerical results is verified with experimental results for verification. The overall goal of this study is to present the advantages and disadvantages of hydrodynamic performance and stability characteristic for X and + tail-body configurations of the underwater vehicle. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=maneuverability" title="maneuverability">maneuverability</a>, <a href="https://publications.waset.org/abstracts/search?q=stability" title=" stability"> stability</a>, <a href="https://publications.waset.org/abstracts/search?q=CFD" title=" CFD"> CFD</a>, <a href="https://publications.waset.org/abstracts/search?q=tail%20configuration" title=" tail configuration"> tail configuration</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrodynamic%20design" title=" hydrodynamic design"> hydrodynamic design</a> </p> <a href="https://publications.waset.org/abstracts/144684/effects-of-x-and-tail-body-configurations-on-hydrodynamic-performance-and-stability-of-an-underwater-vehicle" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/144684.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">184</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3826</span> Inclined Convective Instability in a Porous Layer Saturated with Non-Newtonian Fluid</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rashmi%20Dubey">Rashmi Dubey</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The study aims at investigating the onset of thermal convection in an inclined porous layer saturated with a non-Newtonian fluid. The layer is infinitely extended and has a finite width confined between two boundaries with constant pressure conditions, where the lower one is maintained at a higher temperature. Over the years, this area of research has attracted many scientists and researchers, for it has a plethora of applications in the fields of sciences and engineering, such as in civil engineering, geothermal sites, petroleum industries, etc.Considering the possibilities in a practical scenario, an inclined porous layer is considered, which can be used to develop a generalized model applicable to any inclination. Using the isobaric boundaries, the hydrodynamic boundary conditions are derived for the power-law model and are used to obtain the basic state flow. The convection in the basic state flow is driven by the thermal buoyancy in the flow system and is carried away further due to hydrodynamic boundaries. A linear stability analysis followed by a normal-mode analysis is done to investigate the onset of convection in the buoyancy-driven flow. The analysis shows that the convective instability is always initiated by the non-traveling modes for the Newtonian fluid, but prevails in the form of oscillatory modes, for up to a certain inclination of the porous layer. However, different behavior is observed for the dilatant and pseudoplastic fluids. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=thermal%20convection" title="thermal convection">thermal convection</a>, <a href="https://publications.waset.org/abstracts/search?q=linear%20stability" title=" linear stability"> linear stability</a>, <a href="https://publications.waset.org/abstracts/search?q=porous%20media%20flow" title=" porous media flow"> porous media flow</a>, <a href="https://publications.waset.org/abstracts/search?q=Inclined%20porous%20layer" title=" Inclined porous layer"> Inclined porous layer</a> </p> <a href="https://publications.waset.org/abstracts/147401/inclined-convective-instability-in-a-porous-layer-saturated-with-non-newtonian-fluid" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/147401.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">123</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3825</span> The Effect of the Rain Intensity on the Hydrodynamic Behavior of the Low-Floor Ch茅Liffe</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Abbas">Ahmed Abbas</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Land degradation in the Lower Cheliff region leads to loss of their fertility, physical and chemical properties by secondary salinization and film forming surface or surface crust. The main factor related to runoff and soil erosion is their susceptibility to crusting caused by the impact of raindrops, which causes the reduction of the filterability of the soil. The present study aims to investigate the hydrodynamic behavior of five types of soil taken from the plain of low Cheliff under simulated rainfall by using two intensities, one moderate, and others correspond to heavy rains at low kinetic energies. Experimental results demonstrate the influence of chemical and mechanical physical properties of soils on their hydrodynamic behavior and the influence of heavy rain on the modality of the reduction in the filterability and the amount of transported sediment. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=erosion" title="erosion">erosion</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrodynamic%20behavior" title=" hydrodynamic behavior"> hydrodynamic behavior</a>, <a href="https://publications.waset.org/abstracts/search?q=rain%20simulation" title=" rain simulation"> rain simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=soil" title=" soil"> soil</a> </p> <a href="https://publications.waset.org/abstracts/35337/the-effect-of-the-rain-intensity-on-the-hydrodynamic-behavior-of-the-low-floor-cheliffe" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35337.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">287</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3824</span> A Study on Mesh Size Dependency on Bed Expansion Zone in a Three-Phase Fluidized Bed Reactor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Liliana%20Patricia%20Olivo%20Arias">Liliana Patricia Olivo Arias</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present study focused on the hydrodynamic study in a three-phase fluidized bed reactor and the influence of important aspects, such as volume fractions (Hold up), velocity magnitude of gas, liquid and solid phases (hydrogen, gasoil, and gamma alumina), interactions of phases, through of drag models with the k-epsilon turbulence model. For this purpose was employed a Euler-Euler model and also considers the system is constituted of three phases, gaseous, liquid and solid, characterized by its physical and thermal properties, the transport processes that are developed within the transient regime. The proposed model of the three-phase fluidized bed reactor was solved numerically using the ANSYS-Fluent software with different mesh refinements on bed expansion zone in order to observe the influence of the hydrodynamic parameters and convergence criteria. With this model and the numerical simulations obtained for its resolution, it was possible to predict the results of the volume fractions (Hold ups) and the velocity magnitude for an unsteady system from the initial and boundaries conditions were established. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=three-phase%20fluidized%20bed%20system" title="three-phase fluidized bed system">three-phase fluidized bed system</a>, <a href="https://publications.waset.org/abstracts/search?q=CFD%20simulation" title=" CFD simulation"> CFD simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=mesh%20dependency%20study" title=" mesh dependency study"> mesh dependency study</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrodynamic%20study" title=" hydrodynamic study"> hydrodynamic study</a> </p> <a href="https://publications.waset.org/abstracts/93603/a-study-on-mesh-size-dependency-on-bed-expansion-zone-in-a-three-phase-fluidized-bed-reactor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/93603.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">166</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3823</span> A Thermodynamic Solution for the Static and Dynamic Characteristics of a Two-Lobe Journal Bearing </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=B.%20Chetti">B. Chetti</a>, <a href="https://publications.waset.org/abstracts/search?q=W.%20A.%20Crosby"> W. A. Crosby</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The work described in this paper is an investigation of the static and dynamic characteristics of two-lobe journal bearings taking into consideration the thermal effects. A thermo-hydrodynamic solution of a finite two-lobe journal bearing is performed by solving the generalized form Reynolds equation with the energy equation, taking into consideration viscosity variation across the film thickness. The static and dynamic characteristics were numerically obtained. The results are evaluated for different values of viscosity-temperature coefficient and Peclet number. The results show that considering the thermal effects in the solution of the two-lobe journal bearing has a marked on the study of its stability. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=two-lobe%20bearing" title="two-lobe bearing">two-lobe bearing</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20effect" title=" thermal effect"> thermal effect</a>, <a href="https://publications.waset.org/abstracts/search?q=static" title=" static"> static</a>, <a href="https://publications.waset.org/abstracts/search?q=dynamic%20characteristics" title=" dynamic characteristics"> dynamic characteristics</a> </p> <a href="https://publications.waset.org/abstracts/3887/a-thermodynamic-solution-for-the-static-and-dynamic-characteristics-of-a-two-lobe-journal-bearing" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/3887.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">386</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3822</span> Magneto-Hydrodynamic Mixed Convective Fluid Flow through Two Parallel Vertical Plates Channel with Hall, Chemical Reaction, and Thermal Radiation Effects</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Okuyade%20Ighoroje%20Wilson%20Ata">Okuyade Ighoroje Wilson Ata</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Magneto-hydrodynamic mixed convective chemically reacting fluid flow through two parallel vertical plates channel with Hall, radiation, and chemical reaction effects are examined. The fluid is assumed to be chemically reactive, electrically conducting, magnetically susceptible, viscous, incompressible, and Newtonian; the plates are porous, electrically conductive, and heated to a high-temperature regime to generate thermal rays. The flow system is highly interactive, such that cross/double diffusion is present. The governing equations are partial differential equations transformed into ordinary differential equations using similarity transformation and solved by the method of Homotopy Perturbation. Expressions for the concentration, temperature, velocity, Nusselt number, Sherwood number, and Wall shear stress are obtained, computed, and presented graphically and tabularly. The analysis of results shows, amongst others, that an increase in the Raleigh number increases the main velocity and temperature but decreases the concentration. More so, an increase in chemical reaction rate increases the main velocity, temperature, rate of heat transfer from the terminal plate, the rate of mass transfer from the induced plate, and Wall shear stress on both the induced and terminal plates, decreasing the concentration, and the mass transfer rate from the terminal plate. Some of the obtained results are benchmarked with those of existing literature and are in consonance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chemical%20reaction" title="chemical reaction">chemical reaction</a>, <a href="https://publications.waset.org/abstracts/search?q=hall%20effect" title=" hall effect"> hall effect</a>, <a href="https://publications.waset.org/abstracts/search?q=magneto-hydrodynamic" title=" magneto-hydrodynamic"> magneto-hydrodynamic</a>, <a href="https://publications.waset.org/abstracts/search?q=radiation" title=" radiation"> radiation</a>, <a href="https://publications.waset.org/abstracts/search?q=vertical%20plates%20channel" title=" vertical plates channel"> vertical plates channel</a> </p> <a href="https://publications.waset.org/abstracts/161571/magneto-hydrodynamic-mixed-convective-fluid-flow-through-two-parallel-vertical-plates-channel-with-hall-chemical-reaction-and-thermal-radiation-effects" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/161571.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">77</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3821</span> Investigation about Mechanical Equipment Needed to Break the Molecular Bonds of Heavy Oil by Using Hydrodynamic Cavitation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahdi%20Asghari">Mahdi Asghari</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The cavitation phenomenon is the formation and production of micro-bubbles and eventually the bursting of the micro-bubbles inside the liquid fluid, which results in localized high pressure and temperature, causing physical and chemical fluid changes. This pressure and temperature are predicted to be 2000 atmospheres and 5000 °C, respectively. As a result of small bubbles bursting from this process, temperature and pressure increase momentarily and locally, so that the intensity and magnitude of these temperatures and pressures provide the energy needed to break the molecular bonds of heavy compounds such as fuel oil. In this paper, we study the theory of cavitation and the methods of cavitation production by acoustic and hydrodynamic methods and the necessary mechanical equipment and reactors for industrial application of the hydrodynamic cavitation method to break down the molecular bonds of the fuel oil and convert it into useful and economical products. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cavitation" title="Cavitation">Cavitation</a>, <a href="https://publications.waset.org/abstracts/search?q=Hydrodynamic%20Cavitation" title=" Hydrodynamic Cavitation"> Hydrodynamic Cavitation</a>, <a href="https://publications.waset.org/abstracts/search?q=Cavitation%20Reactor" title=" Cavitation Reactor"> Cavitation Reactor</a>, <a href="https://publications.waset.org/abstracts/search?q=Fuel%20Oil" title=" Fuel Oil"> Fuel Oil</a> </p> <a href="https://publications.waset.org/abstracts/129212/investigation-about-mechanical-equipment-needed-to-break-the-molecular-bonds-of-heavy-oil-by-using-hydrodynamic-cavitation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/129212.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">121</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3820</span> Comparison of Two Theories for the Critical Laser Radius in Thermal Quantum Plasma</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Somaye%20Zare">Somaye Zare</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The critical beam radius is a significant factor that predicts the behavior of the laser beam in the plasma, so if the laser beam radius is adequately greater in comparison to it, the beam will experience stable focusing on the plasma; otherwise, the beam will diverge after entering into the plasma. In this work, considering the paraxial approximation and moment theories, the localization of a relativistic laser beam in thermal quantum plasma is investigated. Using the dielectric function obtained in the quantum hydrodynamic model, the mathematical equation for the laser beam width parameter is attained and solved numerically by the fourth-order Runge-Kutta method. The results demonstrate that the stouter focusing effect is occurred in the moment theory compared to the paraxial approximation. Besides, similar to the two theories, with increasing Fermi temperature, plasma density, and laser intensity, the oscillation rate of the beam width parameter growths and focusing length reduces which means improving the focusing effect. Furthermore, it is understood that behaviors of the critical laser radius are different in the two theories, in the paraxial approximation, the critical radius after a minimum value is enhanced with increasing laser intensity, but in the moment theory, with increasing laser intensity, the critical radius decreases until it becomes independent of the laser intensity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=laser%20localization" title="laser localization">laser localization</a>, <a href="https://publications.waset.org/abstracts/search?q=quantum%20plasma" title=" quantum plasma"> quantum plasma</a>, <a href="https://publications.waset.org/abstracts/search?q=paraxial%20approximation" title=" paraxial approximation"> paraxial approximation</a>, <a href="https://publications.waset.org/abstracts/search?q=moment%20theory" title=" moment theory"> moment theory</a>, <a href="https://publications.waset.org/abstracts/search?q=quantum%20hydrodynamic%20model" title=" quantum hydrodynamic model"> quantum hydrodynamic model</a> </p> <a href="https://publications.waset.org/abstracts/171090/comparison-of-two-theories-for-the-critical-laser-radius-in-thermal-quantum-plasma" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/171090.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">72</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3819</span> Hydrodynamic Behaviour Study of Fast Mono-Hull and Catamaran Vessels in Calm Waters Using Free Surface Flow Analysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Sadeghian">Mohammad Sadeghian</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohsen%20Sadeghian"> Mohsen Sadeghian</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, planning catamaran and mono-hull vessels resistance and trim in calm waters were considered. Hydrodynamic analysis of fast mono-hull planning vessel was also investigated. For hull form geometry optimization, numerical methods of different parameters were used for this type of vessels. Hull material was selected as carbon fiber composite. Exact architectural aspects were specified and stability calculations were performed, as well. Hydrodynamic calculations to extract the resistance force using semi-analytical methods and numerical modeling were carried out. Free surface numerical analysis of vessel in designed draft using finite volume method and double phase were evaluated and verified by experimental tests. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fast%20vessel" title="fast vessel">fast vessel</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrostatic%20and%20hydrodynamic%20optimization" title=" hydrostatic and hydrodynamic optimization"> hydrostatic and hydrodynamic optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=free%20surface%20flow" title=" free surface flow"> free surface flow</a>, <a href="https://publications.waset.org/abstracts/search?q=computational%20fluid%20dynamics" title=" computational fluid dynamics"> computational fluid dynamics</a> </p> <a href="https://publications.waset.org/abstracts/9547/hydrodynamic-behaviour-study-of-fast-mono-hull-and-catamaran-vessels-in-calm-waters-using-free-surface-flow-analysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/9547.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">281</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3818</span> Hydrodynamic Behavior Study of Fast Mono Hull and Catamaran Vessels in Calm Waters Using Free Surface Flow Analysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Ali%20Badri">Mohammad Ali Badri</a>, <a href="https://publications.waset.org/abstracts/search?q=Pouya%20Molana"> Pouya Molana</a>, <a href="https://publications.waset.org/abstracts/search?q=Amin%20Rezvanpour"> Amin Rezvanpour</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, planning catamaran and mono-hull vessels resistance and trim in calm waters were considered. Hydrodynamic analysis of fast mono-hull planning vessel was also investigated. In order to hull form geometry optimization, numerical methods of different parameters were used for this type of vessels. Hull material was selected in carbon fiber composite. Exact architectural aspects were specified and stability calculations were performed as well. Hydrodynamic calculations to extract the resistance force using semi-analytical methods and numerical modeling were carried out. Free surface numerical analysis of vessel in designed draft using finite volume method and double phase were evaluated and verified by experimental tests. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fast%20vessel" title="fast vessel">fast vessel</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrostatic%20and%20hydrodynamic%20optimization" title=" hydrostatic and hydrodynamic optimization"> hydrostatic and hydrodynamic optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=free%20surface%20flow" title=" free surface flow"> free surface flow</a>, <a href="https://publications.waset.org/abstracts/search?q=computational%20fluid%20dynamics" title=" computational fluid dynamics"> computational fluid dynamics</a> </p> <a href="https://publications.waset.org/abstracts/4998/hydrodynamic-behavior-study-of-fast-mono-hull-and-catamaran-vessels-in-calm-waters-using-free-surface-flow-analysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/4998.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">516</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3817</span> A Prospective Evaluation of Thermal Radiation Effects on Magneto-Hydrodynamic Transport of a Nanofluid Traversing a Spongy Medium</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Azad%20Hussain">Azad Hussain</a>, <a href="https://publications.waset.org/abstracts/search?q=Shoaib%20Ali"> Shoaib Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Y.%20Malik"> M. Y. Malik</a>, <a href="https://publications.waset.org/abstracts/search?q=Saba%20Nazir"> Saba Nazir</a>, <a href="https://publications.waset.org/abstracts/search?q=Sarmad%20Jamal"> Sarmad Jamal</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This article reports a fundamental numerical investigation to analyze the impact of thermal radiations on MHD flow of differential type nanofluid past a porous plate. Here, viscosity is taken as function of temperature. Energy equation is deliberated in the existence of viscous dissipation. The mathematical terminologies of nano concentration, velocity and temperature are first cast into dimensionless expressions via suitable conversions and then solved by using Shooting technique to obtain the numerical solutions. Graphs has been plotted to check the convergence of constructed solutions. At the end, the influence of effective parameters on nanoparticle concentration, velocity and temperature fields are also deliberated in a comprehensive way. Moreover, the physical measures of engineering importance such as the Sherwood number, Skin friction and Nusselt number are also calculated. It is perceived that the thermal radiation enhances the temperature for both Vogel's and Reynolds' models but the normal stress parameter causes a reduction in temperature profile. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=MHD%20flow" title="MHD flow">MHD flow</a>, <a href="https://publications.waset.org/abstracts/search?q=differential%20type%20nanofluid" title=" differential type nanofluid"> differential type nanofluid</a>, <a href="https://publications.waset.org/abstracts/search?q=Porous%20medium" title=" Porous medium"> Porous medium</a>, <a href="https://publications.waset.org/abstracts/search?q=variable%20viscosity" title=" variable viscosity"> variable viscosity</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20radiation" title=" thermal radiation"> thermal radiation</a> </p> <a href="https://publications.waset.org/abstracts/89385/a-prospective-evaluation-of-thermal-radiation-effects-on-magneto-hydrodynamic-transport-of-a-nanofluid-traversing-a-spongy-medium" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/89385.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">243</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3816</span> Hydrodynamic and Sediment Transport Analysis of Computational Fluid Dynamics Designed Flow Regulating Liner (Smart Ditch)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Saman%20Mostafazadeh-Fard">Saman Mostafazadeh-Fard</a>, <a href="https://publications.waset.org/abstracts/search?q=Zohrab%20Samani"> Zohrab Samani</a>, <a href="https://publications.waset.org/abstracts/search?q=Kenneth%20Suazo"> Kenneth Suazo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Agricultural ditch liners are used to prevent soil erosion and reduce seepage losses. This paper introduced an approach to validate a computational fluid dynamics (CFD) platform FLOW-3D code and its use to design a flow-regulating corrugated agricultural ditch liner system (Smart Ditch (SM)). Hydrodynamic and sediment transport analyses were performed on the proposed liner flow using the CFD platform FLOW-3D code. The code's hydrodynamic and scour and sediment transport models were calibrated and validated using lab data with an accuracy of 94 % and 95%, respectively. The code was then used to measure hydrodynamic parameters of sublayer turbulent intensity, kinetic energy, dissipation, and packed sediment mass normalized with respect to sublayer flow velocity. Sublayer turbulent intensity, kinetic energy, and dissipation in the SM flow were significantly higher than CR flow. An alternative corrugated liner was also designed, and sediment transport was measured and compared to SM and CR flows. Normalized packed sediment mass with respect to average sublayer flow velocity was 27.8 % lower in alternative flow compared to SM flow. CFD platform FLOW-3D code could effectively be used to design corrugated ditch liner systems and perform hydrodynamic and sediment transport analysis under various corrugation designs. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=CFD" title="CFD">CFD</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrodynamic" title=" hydrodynamic"> hydrodynamic</a>, <a href="https://publications.waset.org/abstracts/search?q=sediment%20transport" title=" sediment transport"> sediment transport</a>, <a href="https://publications.waset.org/abstracts/search?q=ditch" title=" ditch"> ditch</a>, <a href="https://publications.waset.org/abstracts/search?q=liner%20design" title=" liner design"> liner design</a> </p> <a href="https://publications.waset.org/abstracts/150970/hydrodynamic-and-sediment-transport-analysis-of-computational-fluid-dynamics-designed-flow-regulating-liner-smart-ditch" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/150970.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">122</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3815</span> Dynamic Analysis of Submerged Floating Tunnel Subjected to Hydrodynamic and Seismic Loadings</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Naik%20Muhammad">Naik Muhammad</a>, <a href="https://publications.waset.org/abstracts/search?q=Zahid%20Ullah"> Zahid Ullah</a>, <a href="https://publications.waset.org/abstracts/search?q=Dong-Ho%20Choi"> Dong-Ho Choi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Submerged floating tunnel (SFT) is a new solution for the transportation infrastructure through sea straits, fjords, and inland waters, and can be a good alternative to long span suspension bridges. SFT is a massive cylindrical structure that floats at a certain depth below the water surface and subjected to extreme environmental conditions. The identification of dominant structural response of SFT becomes more important due to intended environmental conditions for the design of SFT. The time domain dynamic problem of SFT moored by vertical and inclined mooring cables/anchors is formulated. The dynamic time history analysis of SFT subjected to hydrodynamic and seismic excitations is performed. The SFT is modeled by finite element 3D beam, and the mooring cables are modeled by truss elements. Based on the dynamic time history analysis the displacements and internal forces of SFT were calculated. The response of SFT is presented for hydrodynamic and seismic excitations. The transverse internal forces of SFT were the maximum compared to vertical direction, for both hydrodynamic and seismic cases; this indicates that the cable system provides very small stiffness in transverse direction as compared to vertical direction of SFT. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=submerged%20floating%20tunnel" title="submerged floating tunnel">submerged floating tunnel</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrodynamic%20analysis" title=" hydrodynamic analysis"> hydrodynamic analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=time%20history%20analysis" title=" time history analysis"> time history analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=seismic%20response" title=" seismic response"> seismic response</a> </p> <a href="https://publications.waset.org/abstracts/68033/dynamic-analysis-of-submerged-floating-tunnel-subjected-to-hydrodynamic-and-seismic-loadings" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/68033.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">329</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3814</span> Analysis of Two-Phase Flow Instabilities in Conventional Channel of Nuclear Power Reactor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Abdur%20Rashid%20Sarkar">M. Abdur Rashid Sarkar</a>, <a href="https://publications.waset.org/abstracts/search?q=Riffat%20Mahmud"> Riffat Mahmud</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Boiling heat transfer plays a crucial role in cooling nuclear reactor for safe electricity generation. A two phase flow is susceptible to thermal-hydrodynamic instabilities, which may cause flow oscillations of constant amplitude or diverging amplitude. These oscillations may induce boiling crisis, disturb control systems, or cause mechanical damage. Based on their mechanisms, various types of instabilities can be classified for a nuclear reactor. From a practical engineering point of view one of the major design difficulties in dealing with multiphase flow is that the mass, momentum, and energy transfer rates and processes may be quite sensitive to the geometric configuration of the heat transfer surface. Moreover, the flow within each phase or component will clearly depend on that geometric configuration. The complexity of this two-way coupling presents a major challenge in the study of multiphase flows and there is much that remains to be done. Yet, the parametric effects on flow instability such as the effect of aspect ratio, pressure drop, channel length, its orientation inlet subcooling and surface roughness etc. have been analyzed. Another frequently occurring instability, known as the Kelvin鈥揌elmholtz instability has been briefly reviewed. Various analytical techniques for predicting parametric effect on the instability are analyzed in terms of their applicability and accuracy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=two%20phase%20flows" title="two phase flows">two phase flows</a>, <a href="https://publications.waset.org/abstracts/search?q=boiling%20crisis" title=" boiling crisis"> boiling crisis</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal-hydrodynamic%20instabilities" title=" thermal-hydrodynamic instabilities"> thermal-hydrodynamic instabilities</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20cooled%20nuclear%20reactors" title=" water cooled nuclear reactors"> water cooled nuclear reactors</a>, <a href="https://publications.waset.org/abstracts/search?q=kelvin%E2%80%93helmholtz%20instability" title=" kelvin鈥揾elmholtz instability"> kelvin鈥揾elmholtz instability</a> </p> <a href="https://publications.waset.org/abstracts/40906/analysis-of-two-phase-flow-instabilities-in-conventional-channel-of-nuclear-power-reactor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/40906.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">397</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3813</span> Hydrodynamic Analysis on the Body of a Solar Autonomous Underwater Vehicle by Numerical Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Moonesun">Mohammad Moonesun</a>, <a href="https://publications.waset.org/abstracts/search?q=Ehsan%20Asadi%20Asrami"> Ehsan Asadi Asrami</a>, <a href="https://publications.waset.org/abstracts/search?q=Julia%20Bodnarchuk"> Julia Bodnarchuk </a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the case of Solar Autonomous Underwater Vehicle, which uses photovoltaic panels to provide its required power, due to limitation of energy, accurate estimation of resistance and energy has major sensitivity. In this work, hydrodynamic calculations by numerical method for a solar autonomous underwater vehicle equipped by two 50 W photovoltaic panels has been studied. To evaluate the required power and energy, hull hydrodynamic resistance in several velocities should be taken into account. To do this assessment, the ANSYS FLUENT 18 applied as Computational Fluid Dynamics (CFD) tool that solves Reynolds Average Navier Stokes (RANS) equations around AUV hull, and K-蠅 SST is used as turbulence model. To validate of solution method and modeling approach, the model of Myring submarine that it鈥檚 experimental data was available, is simulated. There is good agreement between numerical and experimental results. Also, these results showed that the K-蠅 SST Turbulence model is an ideal method to simulate the AUV motion in low velocities. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=underwater%20vehicle" title="underwater vehicle">underwater vehicle</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrodynamic%20resistance" title=" hydrodynamic resistance"> hydrodynamic resistance</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20modelling" title=" numerical modelling"> numerical modelling</a>, <a href="https://publications.waset.org/abstracts/search?q=CFD" title=" CFD"> CFD</a>, <a href="https://publications.waset.org/abstracts/search?q=RANS" title=" RANS"> RANS</a> </p> <a href="https://publications.waset.org/abstracts/126524/hydrodynamic-analysis-on-the-body-of-a-solar-autonomous-underwater-vehicle-by-numerical-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/126524.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">205</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3812</span> Electro-Hydrodynamic Analysis of Low-Pressure DC Glow Discharge by Lattice Boltzmann Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ji-Hyok%20Kim">Ji-Hyok Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Il-Gyong%20Paek"> Il-Gyong Paek</a>, <a href="https://publications.waset.org/abstracts/search?q=Yong-Jun%20Kim"> Yong-Jun Kim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We propose a numerical model based on drift-diffusion theory and lattice Boltzmann method (LBM) to analyze the electro-hydrodynamic behavior in low-pressure direct current (DC) glow discharge plasmas. We apply the drift-diffusion theory for 4-species and employ the standard lattice Boltzmann model (SLBM) for the electron, the finite difference-lattice Boltzmann model (FD-LBM) for heavy particles, and the finite difference model (FDM) for the electric potential, respectively. Our results are compared with those of other methods, and emphasize the necessity of a two-dimensional analysis for glow discharge. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=glow%20discharge" title="glow discharge">glow discharge</a>, <a href="https://publications.waset.org/abstracts/search?q=lattice%20Boltzmann%20method" title=" lattice Boltzmann method"> lattice Boltzmann method</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20analysis" title=" numerical analysis"> numerical analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20simulation" title=" plasma simulation"> plasma simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=electro-hydrodynamic" title=" electro-hydrodynamic"> electro-hydrodynamic</a> </p> <a href="https://publications.waset.org/abstracts/177515/electro-hydrodynamic-analysis-of-low-pressure-dc-glow-discharge-by-lattice-boltzmann-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/177515.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">120</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3811</span> Numerical Simulation of Solar Reactor for Water Disinfection</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Sebti%20Bouzid">A. Sebti Bouzid</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Igoud"> S. Igoud</a>, <a href="https://publications.waset.org/abstracts/search?q=L.%20Aoudjit"> L. Aoudjit</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Lebik"> H. Lebik</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Mathematical modeling and numerical simulation have emerged over the past two decades as one of the key tools for design and optimize performances of physical and chemical processes intended to water disinfection. Water photolysis is an efficient and economical technique to reduce bacterial contamination. It exploits the germicidal effect of solar ultraviolet irradiation to inactivate pathogenic microorganisms. The design of photo-reactor operating in continuous disinfection system, required tacking in account the hydrodynamic behavior of water in the reactor. Since the kinetic of disinfection depends on irradiation intensity distribution, coupling the hydrodynamic and solar radiation distribution is of crucial importance. In this work we propose a numerical simulation study for hydrodynamic and solar irradiation distribution in a tubular photo-reactor. We have used the Computational Fluid Dynamic code Fluent under the assumption of three-dimensional incompressible flow in unsteady turbulent regimes. The results of simulation concerned radiation, temperature and velocity fields are discussed and the effect of inclination angle of reactor relative to the horizontal is investigated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=solar%20water%20disinfection" title="solar water disinfection">solar water disinfection</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrodynamic%20modeling" title=" hydrodynamic modeling"> hydrodynamic modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20irradiation%20modeling" title=" solar irradiation modeling"> solar irradiation modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=CFD%20Fluent" title=" CFD Fluent"> CFD Fluent</a> </p> <a href="https://publications.waset.org/abstracts/11937/numerical-simulation-of-solar-reactor-for-water-disinfection" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11937.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">350</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3810</span> Two Major Methods to Control Thermal Resistance of Focus Ring for Process Uniformity Enhance</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jin-Uk%20Park">Jin-Uk Park</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Recently, the semiconductor industry is rapidly demanding complicated structures and mass production. From the point of view of mass production, the ETCH industry is concentrating on maintaining the ER (Etch rate) of the wafer edge constant regardless of changes over time. In this study, two major thermal factors affecting process were identified and controlled. First, the filler of the thermal pad was studied. Second, the significant difference of handling the thermal pad during PM was studied. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=etcher" title="etcher">etcher</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20pad" title=" thermal pad"> thermal pad</a>, <a href="https://publications.waset.org/abstracts/search?q=wet%20cleaning" title=" wet cleaning"> wet cleaning</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20conductivity" title=" thermal conductivity"> thermal conductivity</a> </p> <a href="https://publications.waset.org/abstracts/143443/two-major-methods-to-control-thermal-resistance-of-focus-ring-for-process-uniformity-enhance" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/143443.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">194</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3809</span> Using the Transient Plane Source Method for Measuring Thermal Parameters of Electroceramics</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Peter%20Krupa">Peter Krupa</a>, <a href="https://publications.waset.org/abstracts/search?q=Svetoz%C3%A1r%20Malinari%C4%8D"> Svetoz谩r Malinari膷</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Transient plane source method has been used to measure the thermal diffusivity and thermal conductivity of a compact isostatic electro-ceramics at room temperature. The samples were fired at temperatures from 100 up to 1320 degrees Celsius in steps of 50. Bulk density and specific heat capacity were also measured with their corresponding standard uncertainties. The results were compared with further thermal analysis (dilatometry and thermogravimetry). Structural processes during firing were discussed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=TPS%20method" title="TPS method">TPS method</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20conductivity" title=" thermal conductivity"> thermal conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20diffusivity" title=" thermal diffusivity"> thermal diffusivity</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20analysis" title=" thermal analysis"> thermal analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=electro-ceramics" title=" electro-ceramics"> electro-ceramics</a>, <a href="https://publications.waset.org/abstracts/search?q=firing" title=" firing"> firing</a> </p> <a href="https://publications.waset.org/abstracts/8438/using-the-transient-plane-source-method-for-measuring-thermal-parameters-of-electroceramics" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8438.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">489</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3808</span> The Nonlinear Dynamic Response of a Rotor System Supported by Hydrodynamic Journal Bearings</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amira%20Amamou">Amira Amamou</a>, <a href="https://publications.waset.org/abstracts/search?q=Mnaouar%20Chouchane"> Mnaouar Chouchane</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper investigates the bifurcation and nonlinear behavior of two degrees of freedom model of a symmetrical balanced rigid rotor supported by two identical journal bearings. The fluid film hydrodynamic reactions are modeled by applying both the short and the long bearing approximation and using half Sommerfeld solution. A numerical integration of equations of the journal centre motion is presented to predict the presence and the size of stable or unstable limit cycles in the neighborhood of the stability critical speed. For their stability margins, a continuation method based on the predictor-corrector mechanism is used. The numerical results of responses show that stability and bifurcation behaviors of periodic motions depend strongly on bearing parameters and its dynamic characteristics. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hydrodynamic%20journal%20bearing" title="hydrodynamic journal bearing">hydrodynamic journal bearing</a>, <a href="https://publications.waset.org/abstracts/search?q=nonlinear%20stability" title=" nonlinear stability"> nonlinear stability</a>, <a href="https://publications.waset.org/abstracts/search?q=continuation%20method" title=" continuation method"> continuation method</a>, <a href="https://publications.waset.org/abstracts/search?q=bifurcations" title=" bifurcations"> bifurcations</a> </p> <a href="https://publications.waset.org/abstracts/40937/the-nonlinear-dynamic-response-of-a-rotor-system-supported-by-hydrodynamic-journal-bearings" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/40937.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">409</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=thermal%20and%20hydrodynamic&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=thermal%20and%20hydrodynamic&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=thermal%20and%20hydrodynamic&page=4">4</a></li> <li class="page-item"><a class="page-link" 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