Abstract
In this paper, We arrange the obstacles based on the Koch fractal principle (OKF) in the micromixer. By changing the fluid flow and folding the fluid, a better mixing performance is achieved. We improve the mixing efficiency by placing OKF and changing the position of OKF, then we studied the influence of the number of OKF and the height of the micromixer on the mixing performance. The results show that when eight OKF are staggered in the microchannel and the height is 0.2 mm, the mixing efficiency of the OKF micromixer can reach 97.1%. Finally, we compared the velocity cross section and velocity streamline of the fluid, and analyzed the influence of OKF on the concentration trend. Through analysis, it is concluded that OKF can generate chaotic convection in the fluid, and enhance the mixing of fluids by generating vortices and folding the fluid. It can effectively improve the mixing efficiency of the micromixer.
Funding source: Young Taishan Scholars Program of Shandong Province of China
Award Identifier / Grant number: tsqn2020
Funding source: Shandong Provincial Natural Science Foundation
Award Identifier / Grant number: ZR2021JQ
Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: This work was supported by Young Taishan Scholars Program of Shandong Province of China (tsqn2020), Shandong Provincial Natural Science Foundation (ZR2021JQ).
Conflict of interest statement: The authors declare no conflicts of interest.
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