Numerical simulation for micro-scale flow field with porous medium model
Jin Wen1，2， Zhang Hongyan1， He Wenbo3
(1.School of Environment and Municipal Engineering, Xi′an Architectural and Technological University, Xi′an, Shaanxi 710055, China； 2.Department of Power Engineering, Xi′an Aeronautical College, Xi′an, Shaanxi 710077, China； 3.School of Energy and Power Engineering, Xi′an Jiaotong University, Xi′an, Shaanxi 710049, China)
Abstract： A novel numerical method for simulating micro-scale flow field was established mainly by adopting porous medium model to simulate wall roughness elements. Thickness of porous media was converted by the wall relative roughness, and drag coefficient was determined by flow state as well as resistance of porous media. Under Reynolds number of 100 and 300 respectively, various models were applied to simulate the flow field of square-section micro-channel with side length of 600 μm. Comparison between results of simulation and those of Micro-PIV experiment indicated that, realizable k-ε turbulence model combining porous medium model was most effective for micro-channel flow field simulation, while standard k-ε turbulence model and RNG k-ε turbulence model gave results close to experimental ones with somehow deviations. However, standard k-ω turbulence model and SST k-ω turbulence model exhibited much poor capability in such micro-scale simulations.
金文， 张鸿雁， 何文博. 多孔介质壁面条件下微尺度流动的数值模拟[J]. 排灌机械工程学报, 2010, 28(3): 271-276.
Jin Wen， Zhang Hongyan， He Wenbo. Numerical simulation for micro-scale flow field with porous medium model. Journal of Drainage and Irrigation Machinery Engin, 2010, 28(3): 271-276.
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