In this paper, we mainly study the mixing performance of the micromixer with quartic Koch curve fractal (MQKCF) by numerical simulation. Changing the structure of the microchannel based on the fractal principle can significantly improve the fluid flow state in the microchannel and improve the mixing efficiency of the micromixer. This paper discussed the effects of different fractal deflection angles, microchannel heights and different fractal times on the mixing efficiency under four different Reynolds numbers (Re). It is found that changing the deflection angle of the fractal can bring extremely high benefits, which makes the fluid deflect and fold in the microchannel, enhancing the chaotic convection in the microchannel, and improve the mixing efficiency of the fluid. Under the reasonable arrangement of the quartic Koch curve fractal principle, it can give the micro-mixture more than 99% mixing efficiency. Based on the excellent mixing performance of MQKCF, it also has extremely high application value in the biochemical neighborhood.

中文翻译：

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具有四次科赫曲线分形的新型 3D 微混合器

在本文中，我们主要通过数值模拟研究了具有四次科赫曲线分形（MQKCF）的微混合器的混合性能。根据分形原理改变微通道的结构，可以显着改善微通道内的流体流动状态，提高微混合器的混合效率。本文讨论了四种不同雷诺数(Re)下不同分形偏转角、微通道高度和不同分形时间对混合效率的影响。研究发现，改变分形的偏转角度可以带来极高的效益，使流体在微通道内发生偏转和折叠，增强微通道内的混沌对流，提高流体的混合效率。在四次科赫曲线分形原理的合理安排下，它可以使微量混合物达到99%以上的混合效率。基于MQKCF优异的混合性能，在生化领域也具有极高的应用价值。