Numerical simulation and experiment for velocity field in jagged micro- channel
Jin Wen1,Zhang Hongyan2,He Wenbo3
(1.Department of Power Engineering,Xi′an Aerotechnical College,Xi′an,Shaanxi 710077,China;2.School of Environment and Municipal Engineering,Xi′an Architectural and Technological University,Xi′an,Shaanxi 710055,China;3.School of Energy and Power Engineering,Xi′an Jiaotong University,Xi′an,Shaanxi 710049,China)
Abstract：Under Re of 100 and 300 respectively,the flow field distributions in jagged micro-channel with side lengths of 800 μm were investigated by experimental measurement and numerical simulation.Applying micro-PIV technique,the research got the velocity vector distributions and streamline graphs of the flow field.The results show that the flow structures are the same in each gear of the micro-channel.It has high-speed zone and low-speed zone in the flow field of single gear,and the backflow appears in the flat top and corner with a complete vortex in the low-speed zone.A novel numerical method for simulating micro-scale flow field was established mainly by adopting porous medium model,realizable k-ε turbulence model,and single gear geometric model setting.The flow field distributions in the micro-channel are got by simulating and calculating under periodic boundary conditions.The simulation flow fields are consistent with the experimental results.Through the quantified analysis on the specific cross section,it proves that the simulation value and experimental value have a high degree of similarity,and the numerical simulation approach can be used in all the inflow velocity simulation for the complex structured micro-channels with a wider range of Reynolds.
金文， 张鸿雁， 何文博 . 齿形微通道内流流场数值模拟及试验研究[J]. 排灌机械工程学报, 2011, 29(3): 255-259.
Jin Wen,Zhang Hongyan,He Wenbo. Numerical simulation and experiment for velocity field in jagged micro- channel. Journal of Drainage and Irrigation Machinery Engin, 2011, 29(3): 255-259.
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