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

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 wi...

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Bibliographic Details
Published inApplied mathematics and mechanics Vol. 33; no. 7; pp. 911 - 922
Main Author 王永伟 卢涛 姜培学 成鹏飞 王奎升
Format Journal Article
LanguageEnglish
Published Heidelberg Shanghai University 01.07.2012
School of Mechanical and Electrical Engineering, Beijing University of Chemical Technology,Beijing 100029, P. R. China%Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,Department of Thermal Engineering, Tsinghua University, Beijing 100084, P. R. China
Subjects
Applications of Mathematics
Classical Mechanics
Fluid- and Aerodynamics
Mathematical Modeling and Industrial Mathematics
Mathematics
Mathematics and Statistics
Partial Differential Equations
68U20
sintered porous medium
TK121
large-eddy simulation
tee
mixing
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ISSN0253-4827
1573-2754
DOI10.1007/s10483-012-1594-9

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Summary: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.
Bibliography:Yong-wei WANG , Tao LU Peng-fei CHENG , Pei-xue JIANG, Kui-sheng WANG （1. School of Mechanical and Electrical Engineering, Beijing University of Chemical Technology Beijing 100029, P. R. China; 2. Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, P. R. China）
large-eddy simulation, mixing, tee, sintered porous medium
31-1650/O1
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.
ISSN:0253-4827
1573-2754
DOI:10.1007/s10483-012-1594-9