Mixed convection around a heated vertical cylinder embedded in porous medium  

作　　者：LILing ShigeoKIMURA 

机构地区：[1]DepartmentofHydraulicEngineering,TsinghuaUniversity,Beijing100084,China [2]InstituteofNatureandEnvironmentalTechnology,KanazawaUniversity,Kanazawa920-8667,Japan

出　　处：《Progress in Natural Science:Materials International》2005年第7期661-664,共4页自然科学进展·国际材料（英文版）

基　　金：Supported by Fundamental Fund of Tsinghua University (Grant No. 091204113)the 21st Century COE Program of Japan

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. 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.Numerical simulation has been performed to investigate the combined effectsof wake flow pattern and buoyancy on the characteristics of the flow and heat transfer for the mixedconvective flow around a vertical cylinder embedded in porous medium. Three-dimensional Darcy'sequations are solved. The discretization procedure for the governing equations is based on thefinite-volume method. Peclect number and Rayleigh number are two major independent parametersrepresenting the effects of the flow and heat transfer, respectively. The flow pattern, temperaturedistribution, and Nusselt number distribution are investigated in wide ranges of these independentparameters. Correlation results for the onset of the secondary flow and enhancement of the heattransfer are presented and discussed.

关 键 词：mixed convection porous medium numerical simulation vertical heatedcylinder lateral flow 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]