Large-eddy simulation of fluid mixing in tee with sintered porous medium |
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Authors: | Yong-wei Wang Tao Lu Pei-xue Jiang Peng-fei Cheng Kui-sheng Wang |
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Institution: | 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 |
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Abstract: | Mixing processes of hot and cold fluids in a tee with and without sintered 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 temperature 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 temperature fluctuations in the frequency range from 1 Hz to 10 Hz. |
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Keywords: | large-eddy simulation mixing tee sintered porous medium |
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