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유기수(KisooYoo),송시몬(Simon Song) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
We numerically investigate effects of vorticity on mixing in microchannels. Mixing of two fluids in a Y-shape microchannel is studied using vortex index, mixing index and degree of transverse diffusion. The studies are performed for three geometries: Y-channel, Y-channel with a post array along the centerline, and Y-channel with a zig-zag post array. The results indicate that the high vorticity does not always ensure high performance of mixing in a microchannel. The vorticity of centerline post array and zig-zag post array is about the same, but the zig-zag post array shows significantly better mixing performance than the other.