• TRANSPORT PHENOMENA & FLUID MECHANICS • 上一篇 下一篇
刘演华a; 林建忠a; 包福兵a; 石兴b
a Department of Mechanics, State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
b Department of MechanicalEngineering, National University of Singapore, Singapore, 119260
LIU Yanhuaa; LIN Jianzhonga; BAO Fubinga; SHI Xingb
a Department of Mechanics, State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
b Department of MechanicalEngineering, National University of Singapore, Singapore, 119260
摘要: Based on the transport phenomena theory, the passive mixing of water and ethanol in different threedimensional microchannels is simulated numerically. The average variance of water volume fraction is used to index the mixing efficiency in the cases with different Reynolds number and different fabricated mixers. The results show that the efficiency of liquid mixing is progressively dependent on the convective transport as the Reynolds number increases. The efficiency of serpentine microchannel decreases with the increasing Reynolds number in the laminar regime. Altering the aspect ratio of channel inlet section has no significant effect on the mixing efficiency. Increasing the area of channel inlet section will cause the decrease of the mixing efficiency. The mixing in serpentine channels is the most efficient among three different mixers because of the existence of second flow introduced by its special structure.