Numerical study of Heat Transfer Enhancement by Deformable Twin Plates in Laminar Heated Channel flow
Fluid-structure interaction (FSI) of thin flexible fins coupled with convective heat transfer has applications in energy harvesting and in understanding functioning of several biological systems. We numerically investigate FSI of the thin flexible fins involving large-scale flow-induced deformation...
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description | Fluid-structure interaction (FSI) of thin flexible fins coupled with convective heat transfer has applications in energy harvesting and in understanding functioning of several biological systems. We numerically investigate FSI of the thin flexible fins involving large-scale flow-induced deformation as a potential heat transfer enhancement technique. An in-house, strongly-coupled fluid-structure interaction (FSI) solver is employed in which flow and structure solvers are based on sharp-interface immersed boundary and finite element method, respectively. We consider twin flexible fins in a heated channel with laminar pulsating cross flow. The vortex ring past the fin sweep higher sources of vorticity generated on the channel walls out into the downstream - promoting the mixing of the fluid. The moving fin assists in convective mixing, augmenting convection in bulk and at the walls; and thereby reducing thermal boundary layer thickness and improving heat transfer at the channel walls. The thermal augmentation is quantified in term of instantaneous Nusselt number at the wall. Results are presented for two limiting cases of thermal conductivity of the fin - an insulated fin and a highly conductive fin. We discuss feasibility of flexible fins and effect of flow cycle-to-cycle variation on the Nusselt number. Finally, we investigate the effect of important problem parameters - Young's Modulus, flow frequency and Prandtl number - on the thermal augmentation. |
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We numerically investigate FSI of the thin flexible fins involving large-scale flow-induced deformation as a potential heat transfer enhancement technique. An in-house, strongly-coupled fluid-structure interaction (FSI) solver is employed in which flow and structure solvers are based on sharp-interface immersed boundary and finite element method, respectively. We consider twin flexible fins in a heated channel with laminar pulsating cross flow. The vortex ring past the fin sweep higher sources of vorticity generated on the channel walls out into the downstream - promoting the mixing of the fluid. The moving fin assists in convective mixing, augmenting convection in bulk and at the walls; and thereby reducing thermal boundary layer thickness and improving heat transfer at the channel walls. The thermal augmentation is quantified in term of instantaneous Nusselt number at the wall. Results are presented for two limiting cases of thermal conductivity of the fin - an insulated fin and a highly conductive fin. We discuss feasibility of flexible fins and effect of flow cycle-to-cycle variation on the Nusselt number. Finally, we investigate the effect of important problem parameters - Young's Modulus, flow frequency and Prandtl number - on the thermal augmentation.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.1509.03854</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Augmentation ; Boundary element method ; Boundary layer thickness ; Channel flow ; Computational fluid dynamics ; Convection ; Convective heat transfer ; Cross flow ; Deformation ; Energy harvesting ; Finite element method ; Fins ; Fluid flow ; Fluid-structure interaction ; Formability ; Heat transfer ; Laminar flow ; Modulus of elasticity ; Nusselt number ; Physics - Fluid Dynamics ; Plates (structural members) ; Prandtl number ; Thermal boundary layer ; Thermal conductivity ; Vortex rings ; Vorticity ; Walls</subject><ispartof>arXiv.org, 2016-11</ispartof><rights>2016. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). 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We numerically investigate FSI of the thin flexible fins involving large-scale flow-induced deformation as a potential heat transfer enhancement technique. An in-house, strongly-coupled fluid-structure interaction (FSI) solver is employed in which flow and structure solvers are based on sharp-interface immersed boundary and finite element method, respectively. We consider twin flexible fins in a heated channel with laminar pulsating cross flow. The vortex ring past the fin sweep higher sources of vorticity generated on the channel walls out into the downstream - promoting the mixing of the fluid. The moving fin assists in convective mixing, augmenting convection in bulk and at the walls; and thereby reducing thermal boundary layer thickness and improving heat transfer at the channel walls. The thermal augmentation is quantified in term of instantaneous Nusselt number at the wall. Results are presented for two limiting cases of thermal conductivity of the fin - an insulated fin and a highly conductive fin. We discuss feasibility of flexible fins and effect of flow cycle-to-cycle variation on the Nusselt number. Finally, we investigate the effect of important problem parameters - Young's Modulus, flow frequency and Prandtl number - on the thermal augmentation.</description><subject>Augmentation</subject><subject>Boundary element method</subject><subject>Boundary layer thickness</subject><subject>Channel flow</subject><subject>Computational fluid dynamics</subject><subject>Convection</subject><subject>Convective heat transfer</subject><subject>Cross flow</subject><subject>Deformation</subject><subject>Energy harvesting</subject><subject>Finite element method</subject><subject>Fins</subject><subject>Fluid flow</subject><subject>Fluid-structure interaction</subject><subject>Formability</subject><subject>Heat transfer</subject><subject>Laminar flow</subject><subject>Modulus of elasticity</subject><subject>Nusselt number</subject><subject>Physics - Fluid Dynamics</subject><subject>Plates (structural members)</subject><subject>Prandtl number</subject><subject>Thermal boundary layer</subject><subject>Thermal conductivity</subject><subject>Vortex rings</subject><subject>Vorticity</subject><subject>Walls</subject><issn>2331-8422</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GOX</sourceid><recordid>eNotkDFPwzAUhC0kJKrSH8CEJeYU-8Vu3BGVQpEqYMgevTjPIlXiFDuh9N-Ttkx3w93p9DF2J8VcGa3FI4bf-mcutVjORWq0umITSFOZGAVww2Yx7oQQsMhA63TC6H1oKdQWGx77oTryzvENYc_zgD46Cnztv9Bbasn3vDzyZ3JdaLFsiOeH2vPPBnuKfHRbbGuP4Vyniq_GmqeGu6Y73LJrh02k2b9OWf6yzlebZPvx-rZ62iaoARIrrVaSdCkUWDIWBbnMaYmVA6tQUrbEzEghpVEZoIUURFXCEqzFUhOkU3Z_mT0zKPahbjEcixOL4sxiTDxcEvvQfQ8U-2LXDcGPnwoQRiwMaAnpHwhfYfk</recordid><startdate>20161116</startdate><enddate>20161116</enddate><creator>Joshi, Rakshitha U</creator><creator>Soti, Atul K</creator><creator>Bhardwaj, Rajneesh</creator><general>Cornell University Library, arXiv.org</general><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M7S</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>GOX</scope></search><sort><creationdate>20161116</creationdate><title>Numerical study of Heat Transfer Enhancement by Deformable Twin Plates in Laminar Heated Channel flow</title><author>Joshi, Rakshitha U ; Soti, Atul K ; Bhardwaj, Rajneesh</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a522-c1c541e5b042ce8ca0ef7f51adf2c4a1e79a7810118472ac2320db292ccab5e23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Augmentation</topic><topic>Boundary element method</topic><topic>Boundary layer thickness</topic><topic>Channel flow</topic><topic>Computational fluid dynamics</topic><topic>Convection</topic><topic>Convective heat transfer</topic><topic>Cross flow</topic><topic>Deformation</topic><topic>Energy harvesting</topic><topic>Finite element method</topic><topic>Fins</topic><topic>Fluid flow</topic><topic>Fluid-structure interaction</topic><topic>Formability</topic><topic>Heat transfer</topic><topic>Laminar flow</topic><topic>Modulus of elasticity</topic><topic>Nusselt number</topic><topic>Physics - Fluid Dynamics</topic><topic>Plates (structural members)</topic><topic>Prandtl number</topic><topic>Thermal boundary layer</topic><topic>Thermal conductivity</topic><topic>Vortex rings</topic><topic>Vorticity</topic><topic>Walls</topic><toplevel>online_resources</toplevel><creatorcontrib>Joshi, Rakshitha U</creatorcontrib><creatorcontrib>Soti, Atul K</creatorcontrib><creatorcontrib>Bhardwaj, Rajneesh</creatorcontrib><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><collection>arXiv.org</collection><jtitle>arXiv.org</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Joshi, Rakshitha U</au><au>Soti, Atul K</au><au>Bhardwaj, Rajneesh</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Numerical study of Heat Transfer Enhancement by Deformable Twin Plates in Laminar Heated Channel flow</atitle><jtitle>arXiv.org</jtitle><date>2016-11-16</date><risdate>2016</risdate><eissn>2331-8422</eissn><abstract>Fluid-structure interaction (FSI) of thin flexible fins coupled with convective heat transfer has applications in energy harvesting and in understanding functioning of several biological systems. We numerically investigate FSI of the thin flexible fins involving large-scale flow-induced deformation as a potential heat transfer enhancement technique. An in-house, strongly-coupled fluid-structure interaction (FSI) solver is employed in which flow and structure solvers are based on sharp-interface immersed boundary and finite element method, respectively. We consider twin flexible fins in a heated channel with laminar pulsating cross flow. The vortex ring past the fin sweep higher sources of vorticity generated on the channel walls out into the downstream - promoting the mixing of the fluid. The moving fin assists in convective mixing, augmenting convection in bulk and at the walls; and thereby reducing thermal boundary layer thickness and improving heat transfer at the channel walls. The thermal augmentation is quantified in term of instantaneous Nusselt number at the wall. Results are presented for two limiting cases of thermal conductivity of the fin - an insulated fin and a highly conductive fin. We discuss feasibility of flexible fins and effect of flow cycle-to-cycle variation on the Nusselt number. Finally, we investigate the effect of important problem parameters - Young's Modulus, flow frequency and Prandtl number - on the thermal augmentation.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><doi>10.48550/arxiv.1509.03854</doi><oa>free_for_read</oa></addata></record> |
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subjects | Augmentation Boundary element method Boundary layer thickness Channel flow Computational fluid dynamics Convection Convective heat transfer Cross flow Deformation Energy harvesting Finite element method Fins Fluid flow Fluid-structure interaction Formability Heat transfer Laminar flow Modulus of elasticity Nusselt number Physics - Fluid Dynamics Plates (structural members) Prandtl number Thermal boundary layer Thermal conductivity Vortex rings Vorticity Walls |
title | Numerical study of Heat Transfer Enhancement by Deformable Twin Plates in Laminar Heated Channel flow |
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