具有螺旋微通道的被动式混沌微混合器的数值分析

Numerical analysis on a passive chaotic micromixer with helical microchannel.

作者信息

Wang Ruijin, Lin Jianzhong

机构信息

Department of Mechanical Engineering, Zhejiang University of Science and Technology, Hangzhou 310012, PR China.

出版信息

J Nanosci Nanotechnol. 2006 Jan;6(1):190-4.

PMID:16573094

Abstract

In order to improve the mixing efficiency, the diffusion and mixing of species in the helical micro-mixer are simulated numerically. The results show that the mixing efficiency in the helical micromixer is much higher than that in the straight micro-channel and obviously higher than that in the serpentine micro-channel when Reynolds number is low. At high Reynolds number, even though the mixing efficiency in the helical micro-mixer is still much higher than that in the straight micro-channel, no obvious difference of mixing efficiency in the helical micro-mixer and serpentine micro-channel is found. The conclusions are helpful to optimize the structure of the micro-mixer.

摘要

为了提高混合效率，对螺旋微混合器中物质的扩散和混合进行了数值模拟。结果表明，当雷诺数较低时，螺旋微混合器中的混合效率远高于直管微通道中的混合效率，且明显高于蛇形微通道中的混合效率。在高雷诺数下，尽管螺旋微混合器中的混合效率仍远高于直管微通道中的混合效率，但未发现螺旋微混合器与蛇形微通道在混合效率上有明显差异。这些结论有助于优化微混合器的结构。