A study of mixing index and geometric structure for a split and recombine micromixer with dislocation channel

Based on the principle of asymmetric split and recombine, this paper has adopted a numerical simulation for the optimized micromixer with dislocation sub-channel to get mixing performance and taken the mixing index as a measurement index. The results show that when Re is ranging from 1 to 80, parameters of geometric structure affect the mixing index of the micromixer obviously and the mixing index is improved if the dislocation sub-channel is set in the major channel. Considering the mixing performance and the pressure drop in the sub-channel, the mixing index of asymmetric split and recombine micromixer with dislocation sub-channel can be increased to 86% when the geometric structure parameter of the dislocation sub-channel is w ₃/w ₄=1.