A fast design method for passive micromixer with angled bend

Abstract

In this paper, the mixed process is divided into the on-way mixing and local mixing, and allows the local mixing to be transformed to equivalent on-way mixing. By analysis of numerical simulation, on the one hand, the on-way mixing efficiency is proportional to the diffusion rate, density ratio, and is also inversely proportional to the channel width and flow velocity. On the other hand, equivalent on-way mixing length is set as the increased channel length caused by the angled bend, which is proportional to the flow velocity and the bend angle, and is also inversely proportional to the channel width. Furthermore, mixing efficiency calculation formula is presented, and the steps of designing a micro-mixer quickly is summarized, which are suitable for any passive micromixer with angled bends.

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Acknowledgements

This project is supported by the National Natural Science Foundation of China (Grant No. 51505077), the Project Agreement for Science and Technology Development of Jilin Province (20170520099JH) and the Science and Technology Innovation Development Project of Jilin City (201750230, 20166013, 20166012).

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Correspondence to Kai Cheng.

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Su, T., Cheng, K., Wang, J. et al. A fast design method for passive micromixer with angled bend. Microsyst Technol 25, 4391–4397 (2019). https://doi.org/10.1007/s00542-019-04433-z

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