Macro and mesoscale simulations of free convective heat transfer in a cavity at various aspect ratios
In this study, we present the behavior of free convective heat transfer in a rectangular cavity by two entirely different scales of numerical methods, namely a mesoscale and macroscale methods. The cavity is bounded by two vertical isothermal walls kept at different temperatures and by two horizonta...
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| Format: | Article |
| Language: | English |
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Asian Network for Scientific Information
2010
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| Online Access: | http://eprints.utm.my/26280/1/NorAzwadiCheSidek2010_MacroandMesoscaleSimulationsofFree.pdf |
| _version_ | 1796856175551053824 |
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| author | Che Sidek, Nor Azwadi Irwan, M. A. M. |
| author_facet | Che Sidek, Nor Azwadi Irwan, M. A. M. |
| author_sort | Che Sidek, Nor Azwadi |
| collection | ePrints |
| description | In this study, we present the behavior of free convective heat transfer in a rectangular cavity by two entirely different scales of numerical methods, namely a mesoscale and macroscale methods. The cavity is bounded by two vertical isothermal walls kept at different temperatures and by two horizontal perfectly conducting walls. The heat flow simulations were carried out across the two isothermal walls by varying the aspect ratio of cavity with six different values -0.2, 0.5, 1.5, 2.0, 2.5 and 3.0. The macroscale simulations were performed by solving the Navier-Stokes equation using finite difference scheme while the mesoscale simulations were done using lattice Boltzmann method. This study found that the heat transfer mechanism, fluid flow behavior in terms of formation, size and strength of vortex are critically depending on the aspect ratio of the geometry. Numerical results also show excellent agreement between these two scales of simulations. |
| first_indexed | 2024-03-05T18:39:34Z |
| format | Article |
| id | utm.eprints-26280 |
| institution | Universiti Teknologi Malaysia - ePrints |
| language | English |
| last_indexed | 2024-03-05T18:39:34Z |
| publishDate | 2010 |
| publisher | Asian Network for Scientific Information |
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| spelling | utm.eprints-262802018-10-31T12:28:02Z http://eprints.utm.my/26280/ Macro and mesoscale simulations of free convective heat transfer in a cavity at various aspect ratios Che Sidek, Nor Azwadi Irwan, M. A. M. TJ Mechanical engineering and machinery In this study, we present the behavior of free convective heat transfer in a rectangular cavity by two entirely different scales of numerical methods, namely a mesoscale and macroscale methods. The cavity is bounded by two vertical isothermal walls kept at different temperatures and by two horizontal perfectly conducting walls. The heat flow simulations were carried out across the two isothermal walls by varying the aspect ratio of cavity with six different values -0.2, 0.5, 1.5, 2.0, 2.5 and 3.0. The macroscale simulations were performed by solving the Navier-Stokes equation using finite difference scheme while the mesoscale simulations were done using lattice Boltzmann method. This study found that the heat transfer mechanism, fluid flow behavior in terms of formation, size and strength of vortex are critically depending on the aspect ratio of the geometry. Numerical results also show excellent agreement between these two scales of simulations. Asian Network for Scientific Information 2010 Article PeerReviewed application/pdf en http://eprints.utm.my/26280/1/NorAzwadiCheSidek2010_MacroandMesoscaleSimulationsofFree.pdf Che Sidek, Nor Azwadi and Irwan, M. A. M. (2010) Macro and mesoscale simulations of free convective heat transfer in a cavity at various aspect ratios. Journal of Applied Sciences, 10 (3). 203 -208. ISSN 1812-5654 http://scialert.net/abstract/?doi=jas.2010.203.208 DOI:10.3923/jas.2010.203.208 |
| spellingShingle | TJ Mechanical engineering and machinery Che Sidek, Nor Azwadi Irwan, M. A. M. Macro and mesoscale simulations of free convective heat transfer in a cavity at various aspect ratios |
| title | Macro and mesoscale simulations of free convective heat transfer in a cavity at various aspect ratios |
| title_full | Macro and mesoscale simulations of free convective heat transfer in a cavity at various aspect ratios |
| title_fullStr | Macro and mesoscale simulations of free convective heat transfer in a cavity at various aspect ratios |
| title_full_unstemmed | Macro and mesoscale simulations of free convective heat transfer in a cavity at various aspect ratios |
| title_short | Macro and mesoscale simulations of free convective heat transfer in a cavity at various aspect ratios |
| title_sort | macro and mesoscale simulations of free convective heat transfer in a cavity at various aspect ratios |
| topic | TJ Mechanical engineering and machinery |
| url | http://eprints.utm.my/26280/1/NorAzwadiCheSidek2010_MacroandMesoscaleSimulationsofFree.pdf |
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