Large-eddy simulation of fluid mixing in tee with sintered porous medium  

作　　者：王永伟 卢涛 姜培学 程鹏飞 王奎生 

机构地区：[1]School of Mechanical and Electrical Engineering,Beijing University of Chemical Technology [2]Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,Department of Thermal Engineering,Tsinghua University

出　　处：《Applied Mathematics and Mechanics(English Edition)》2012年第7期911-922,共12页应用数学和力学（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 50906002);the National Basic Research Program of China (No. 2011CB706900);the Research Fund for the Doctoral Program of Higher Education of China (No. 20090010110006);the Beijing Novel Program of China (No. 2008B16)

摘　　要：Mixing processes of hot and cold fluids in a tee with and without sin- tered copper spheres are simulated by FLUENT using the large-eddy simulation （LES） turbulent flow model and the sub-grid scale （SGS） Smagorinsky-Lilly （SL） model with buoyancy. Comparisons of numerical results of the two cases with and without sintered copper spheres show that the porous medium significantly reduces velocity and temper- ature fluctuations because the porous medium can effectively restrict the fluid flow and enhance heat transfer. The porous medium obviously increases the pressure drop in the main duct. The porous medium reduces the power spectrum density （PSD） of tempera- ture fluctuations in the frequency range from 1 Hz to 10 Hz.Mixing processes of hot and cold fluids in a tee with and without sin- tered copper spheres are simulated by FLUENT using the large-eddy simulation （LES） turbulent flow model and the sub-grid scale （SGS） Smagorinsky-Lilly （SL） model with buoyancy. Comparisons of numerical results of the two cases with and without sintered copper spheres show that the porous medium significantly reduces velocity and temper- ature fluctuations because the porous medium can effectively restrict the fluid flow and enhance heat transfer. The porous medium obviously increases the pressure drop in the main duct. The porous medium reduces the power spectrum density （PSD） of tempera- ture fluctuations in the frequency range from 1 Hz to 10 Hz.

关 键 词：large-eddy simulation MIXING TEE sintered porous medium 

分 类 号：TK124[动力工程及工程热物理—工程热物理]