The three-dimensional flow field and heat transfer in a rib-roughened channel at large rotation numbers
•Large Eddy Simulations are applied in a rotating rib-roughened cannel.•The present results complement the existing the experimental data by providing the picture of the entire flow field.•The secondary flows and temperature fields are fully characterized at different rotating conditions. The turbul...
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Veröffentlicht in: | International journal of heat and mass transfer 2018-08, Vol.123, p.848-866 |
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description | •Large Eddy Simulations are applied in a rotating rib-roughened cannel.•The present results complement the existing the experimental data by providing the picture of the entire flow field.•The secondary flows and temperature fields are fully characterized at different rotating conditions.
The turbulent velocity field in a rotating rib-roughened channel is studied by means of incompressible Large Eddy Simulations (LES). The computations are validated against Particle Image Velocimetry (PIV) measurements performed in the symmetry plane of an experimental model of the same geometry. The present simulations consider the effect of the Coriolis force on a periodic section of low aspect ratio (AR = 0.9) and one rib-roughened wall. The Reynolds number based on the bulk velocity and the hydraulic diameter is fixed to 15,000, whereas the rotation number is set to 0, 0.31 and 0.77. Beyond the analysis of the Coriolis force influence on the shear layer stability, the present simulations allow to characterize the stream-wise secondary flows that redistribute the momentum through the cross-section at the different rotation numbers, the temperature distribution, and the resulting heat transfer on the wall. The flow structure is similar at rotation numbers equal to 0.31 and 0.77 when the channel rotates in the clockwise direction, with reduced turbulence and heat transfer on the ribbed wall, which acts as leading side. Only minor differences in the secondary flows and mean velocity profiles are observed due to the different magnitude of the Coriolis force. On the other hand, it has been observed that the secondary flow structure differs significantly when the rotation number is increased from 0.30 to 0.77 under counter-clockwise rotation. In particular, Taylor-Görtler vortices are observed together with the Coriolis-induced secondary flows at the maximum rotation rate, leading to a redistribution of the mean and turbulent velocity fields, as well as a significant change in the heat transfer distribution. |
doi_str_mv | 10.1016/j.ijheatmasstransfer.2018.03.009 |
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The turbulent velocity field in a rotating rib-roughened channel is studied by means of incompressible Large Eddy Simulations (LES). The computations are validated against Particle Image Velocimetry (PIV) measurements performed in the symmetry plane of an experimental model of the same geometry. The present simulations consider the effect of the Coriolis force on a periodic section of low aspect ratio (AR = 0.9) and one rib-roughened wall. The Reynolds number based on the bulk velocity and the hydraulic diameter is fixed to 15,000, whereas the rotation number is set to 0, 0.31 and 0.77. Beyond the analysis of the Coriolis force influence on the shear layer stability, the present simulations allow to characterize the stream-wise secondary flows that redistribute the momentum through the cross-section at the different rotation numbers, the temperature distribution, and the resulting heat transfer on the wall. The flow structure is similar at rotation numbers equal to 0.31 and 0.77 when the channel rotates in the clockwise direction, with reduced turbulence and heat transfer on the ribbed wall, which acts as leading side. Only minor differences in the secondary flows and mean velocity profiles are observed due to the different magnitude of the Coriolis force. On the other hand, it has been observed that the secondary flow structure differs significantly when the rotation number is increased from 0.30 to 0.77 under counter-clockwise rotation. In particular, Taylor-Görtler vortices are observed together with the Coriolis-induced secondary flows at the maximum rotation rate, leading to a redistribution of the mean and turbulent velocity fields, as well as a significant change in the heat transfer distribution.</description><identifier>ISSN: 0017-9310</identifier><identifier>EISSN: 1879-2189</identifier><identifier>DOI: 10.1016/j.ijheatmasstransfer.2018.03.009</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Channel flow ; Computational fluid dynamics ; Computer simulation ; Coriolis ; Coriolis force ; Fluid dynamics ; Fluid flow ; Heat transfer ; Internal cooling ; Large eddy simulation ; Low aspect ratio ; Particle image velocimetry ; Reynolds number ; Rib roughened channels ; Ribs (structural) ; Rotation ; Secondary flow ; Stability analysis ; System rotation ; Temperature distribution ; Three dimensional flow ; Turbulator ; Turbulence ; Velocity ; Velocity distribution ; Velocity measurement</subject><ispartof>International journal of heat and mass transfer, 2018-08, Vol.123, p.848-866</ispartof><rights>2018 Elsevier Ltd</rights><rights>Copyright Elsevier BV Aug 2018</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c370t-f0b54a18cbf4ab43055c96c42539d528d3be2e063a65f3d1d4bb1a242ee2ec7a3</citedby><cites>FETCH-LOGICAL-c370t-f0b54a18cbf4ab43055c96c42539d528d3be2e063a65f3d1d4bb1a242ee2ec7a3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.ijheatmasstransfer.2018.03.009$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3549,27923,27924,45994</link.rule.ids></links><search><creatorcontrib>Mayo, Ignacio</creatorcontrib><creatorcontrib>Arts, Tony</creatorcontrib><creatorcontrib>Gicquel, Laurent Y.M.</creatorcontrib><title>The three-dimensional flow field and heat transfer in a rib-roughened channel at large rotation numbers</title><title>International journal of heat and mass transfer</title><description>•Large Eddy Simulations are applied in a rotating rib-roughened cannel.•The present results complement the existing the experimental data by providing the picture of the entire flow field.•The secondary flows and temperature fields are fully characterized at different rotating conditions.
The turbulent velocity field in a rotating rib-roughened channel is studied by means of incompressible Large Eddy Simulations (LES). The computations are validated against Particle Image Velocimetry (PIV) measurements performed in the symmetry plane of an experimental model of the same geometry. The present simulations consider the effect of the Coriolis force on a periodic section of low aspect ratio (AR = 0.9) and one rib-roughened wall. The Reynolds number based on the bulk velocity and the hydraulic diameter is fixed to 15,000, whereas the rotation number is set to 0, 0.31 and 0.77. Beyond the analysis of the Coriolis force influence on the shear layer stability, the present simulations allow to characterize the stream-wise secondary flows that redistribute the momentum through the cross-section at the different rotation numbers, the temperature distribution, and the resulting heat transfer on the wall. The flow structure is similar at rotation numbers equal to 0.31 and 0.77 when the channel rotates in the clockwise direction, with reduced turbulence and heat transfer on the ribbed wall, which acts as leading side. Only minor differences in the secondary flows and mean velocity profiles are observed due to the different magnitude of the Coriolis force. On the other hand, it has been observed that the secondary flow structure differs significantly when the rotation number is increased from 0.30 to 0.77 under counter-clockwise rotation. In particular, Taylor-Görtler vortices are observed together with the Coriolis-induced secondary flows at the maximum rotation rate, leading to a redistribution of the mean and turbulent velocity fields, as well as a significant change in the heat transfer distribution.</description><subject>Channel flow</subject><subject>Computational fluid dynamics</subject><subject>Computer simulation</subject><subject>Coriolis</subject><subject>Coriolis force</subject><subject>Fluid dynamics</subject><subject>Fluid flow</subject><subject>Heat transfer</subject><subject>Internal cooling</subject><subject>Large eddy simulation</subject><subject>Low aspect ratio</subject><subject>Particle image velocimetry</subject><subject>Reynolds number</subject><subject>Rib roughened channels</subject><subject>Ribs (structural)</subject><subject>Rotation</subject><subject>Secondary flow</subject><subject>Stability analysis</subject><subject>System rotation</subject><subject>Temperature distribution</subject><subject>Three dimensional flow</subject><subject>Turbulator</subject><subject>Turbulence</subject><subject>Velocity</subject><subject>Velocity distribution</subject><subject>Velocity measurement</subject><issn>0017-9310</issn><issn>1879-2189</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNqNkDtPxDAQhC0EEsfjP1iioUlYx3l2oBNPnURz1JZjby6OEuewExD_HkcHFQ3VandH32iGkGsGMQOW33Sx6VqU0yC9n5y0vkEXJ8DKGHgMUB2RFSuLKkpYWR2TFQArooozOCVn3nfLCmm-Irtti3RqHWKkzYDWm9HKnjb9-Ekbg72m0mq6GNFfF2osldSZOnLjvGvRoqaqldZiT4Osl26H1I2TnAKL2nmo0fkLctLI3uPlzzwnbw_32_VTtHl9fF7fbSLFC5iiBuoslaxUdZPKOuWQZarKVZpkvNJZUmpeY4KQc5lnDddMp3XNZJImGM6qkPycXB24eze-z-gn0Y2zC5G8SKDIWVWVeRZUtweVcqP3Dhuxd2aQ7kswEEu9ohN_6xVLvQK4CPUGxMsBgSHNhwlfrwxahdo4VJPQo_k_7BuivpHP</recordid><startdate>201808</startdate><enddate>201808</enddate><creator>Mayo, Ignacio</creator><creator>Arts, Tony</creator><creator>Gicquel, Laurent Y.M.</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>KR7</scope><scope>L7M</scope></search><sort><creationdate>201808</creationdate><title>The three-dimensional flow field and heat transfer in a rib-roughened channel at large rotation numbers</title><author>Mayo, Ignacio ; Arts, Tony ; Gicquel, Laurent Y.M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c370t-f0b54a18cbf4ab43055c96c42539d528d3be2e063a65f3d1d4bb1a242ee2ec7a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Channel flow</topic><topic>Computational fluid dynamics</topic><topic>Computer simulation</topic><topic>Coriolis</topic><topic>Coriolis force</topic><topic>Fluid dynamics</topic><topic>Fluid flow</topic><topic>Heat transfer</topic><topic>Internal cooling</topic><topic>Large eddy simulation</topic><topic>Low aspect ratio</topic><topic>Particle image velocimetry</topic><topic>Reynolds number</topic><topic>Rib roughened channels</topic><topic>Ribs (structural)</topic><topic>Rotation</topic><topic>Secondary flow</topic><topic>Stability analysis</topic><topic>System rotation</topic><topic>Temperature distribution</topic><topic>Three dimensional flow</topic><topic>Turbulator</topic><topic>Turbulence</topic><topic>Velocity</topic><topic>Velocity distribution</topic><topic>Velocity measurement</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mayo, Ignacio</creatorcontrib><creatorcontrib>Arts, Tony</creatorcontrib><creatorcontrib>Gicquel, Laurent Y.M.</creatorcontrib><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>International journal of heat and mass transfer</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Mayo, Ignacio</au><au>Arts, Tony</au><au>Gicquel, Laurent Y.M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The three-dimensional flow field and heat transfer in a rib-roughened channel at large rotation numbers</atitle><jtitle>International journal of heat and mass transfer</jtitle><date>2018-08</date><risdate>2018</risdate><volume>123</volume><spage>848</spage><epage>866</epage><pages>848-866</pages><issn>0017-9310</issn><eissn>1879-2189</eissn><abstract>•Large Eddy Simulations are applied in a rotating rib-roughened cannel.•The present results complement the existing the experimental data by providing the picture of the entire flow field.•The secondary flows and temperature fields are fully characterized at different rotating conditions.
The turbulent velocity field in a rotating rib-roughened channel is studied by means of incompressible Large Eddy Simulations (LES). The computations are validated against Particle Image Velocimetry (PIV) measurements performed in the symmetry plane of an experimental model of the same geometry. The present simulations consider the effect of the Coriolis force on a periodic section of low aspect ratio (AR = 0.9) and one rib-roughened wall. The Reynolds number based on the bulk velocity and the hydraulic diameter is fixed to 15,000, whereas the rotation number is set to 0, 0.31 and 0.77. Beyond the analysis of the Coriolis force influence on the shear layer stability, the present simulations allow to characterize the stream-wise secondary flows that redistribute the momentum through the cross-section at the different rotation numbers, the temperature distribution, and the resulting heat transfer on the wall. The flow structure is similar at rotation numbers equal to 0.31 and 0.77 when the channel rotates in the clockwise direction, with reduced turbulence and heat transfer on the ribbed wall, which acts as leading side. Only minor differences in the secondary flows and mean velocity profiles are observed due to the different magnitude of the Coriolis force. On the other hand, it has been observed that the secondary flow structure differs significantly when the rotation number is increased from 0.30 to 0.77 under counter-clockwise rotation. In particular, Taylor-Görtler vortices are observed together with the Coriolis-induced secondary flows at the maximum rotation rate, leading to a redistribution of the mean and turbulent velocity fields, as well as a significant change in the heat transfer distribution.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.ijheatmasstransfer.2018.03.009</doi><tpages>19</tpages></addata></record> |
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subjects | Channel flow Computational fluid dynamics Computer simulation Coriolis Coriolis force Fluid dynamics Fluid flow Heat transfer Internal cooling Large eddy simulation Low aspect ratio Particle image velocimetry Reynolds number Rib roughened channels Ribs (structural) Rotation Secondary flow Stability analysis System rotation Temperature distribution Three dimensional flow Turbulator Turbulence Velocity Velocity distribution Velocity measurement |
title | The three-dimensional flow field and heat transfer in a rib-roughened channel at large rotation numbers |
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