| Mixed convection around a heated vertical cylinder embedded in porous medium |
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| 作者姓名： | LI Ling Shigeo KIMURA |
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| 作者单位： | Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China,Institute of Nature and Environmental Technology, Kanazawa University, Kanazawa 920-8667, Japan |
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| 基金项目： | 清华大学校科研和教改项目，the 21st Century COE Program of Japan |
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| 摘 要： | Numerical simulation has been performed to investigate the combined effects of wake flow pattern and buoyancy on the characteristics of the flow and heat transfer for the mixed convective flow around a vertical cylinder embedded in porous medium. Three-dimensional Darcy's equations are solved. The discretization procedure for the governing equations is based on the finite-volume method. Peclect number and Rayleigh number are two major independent parameters representing the effects of the flow and heat transfer, respectively. The flow pattern, temperature distribution, and Nusselt number distribution are investigated in wide ranges of these independent parameters. Correlation results for the onset of the secondary flow and enhancement of the heat transfer are presented and discussed.
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| 关 键 词： | mixed convection porous medium numerical simulation vertical heated cylinder lateral flow. |
Mixed convection around a heated vertical cylinder embedded in porous medium |
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| LI Ling,Shigeo KIMURA.Mixed convection around a heated vertical cylinder embedded in porous medium[J].Progress in Natural Science,2005,15(7):661-664. |
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| Authors: | LI Ling Shigeo KIMURA |
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| Institution: | 1. Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China
2. Institute of Nature and Environmental Technology, Kanazawa University, Kanazawa 920-8667, Japan |
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| Abstract: | Numerical simulation has been performed to investigate the combined effects of wake flow pattern and buoyancy on the characteristics of the flow and heat transfer for the mixed convective flow around a vertical cylinder embedded in porous medium. Threedimensional Darcy's equations are solved. The discretization procedure for the governing equations is based on the finite-volume method.Peclect number and Rayleigh number are two major independent parameters representing the effects of the flow and heat transfer, respectively. The flow pattern, temperature distribution, and Nusselt number distribution are investigated in wide ranges of these independent parameters. Correlation results for the onset of the secondary flow and enhancement of the heat transfer are presented and discussed. |
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| Keywords: | mixed convection porous medium numerical simulation vertical heated cylinder lateral flow |
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