Fu Qiang, Liu Zenghao, Cao Shuaiqi, Wang Zhe, Liu Guojun
College of Mechanical and Aerospace Engineering, Jilin University, Changchun 130025, China.
Micromachines (Basel). 2023 Aug 14;14(8):1599. doi: 10.3390/mi14081599.
In this work, a serpentine mixing unit model based on topology optimization is proposed to enhance the reverse flow in both horizontal and vertical directions. The increase in reverse flow in both directions can enhance the chaotic advection phenomenon, leading to a rapid increase in the mixing index. The proposed mixing unit model is applied in a T-shaped micromixer to create a new micromixer design, named TOD. Numerical simulations of TOD are performed using Comsol Multiphysics software to analyze the characteristics of the liquid flow, mixing surface, and pressure drop. The simulation results confirm that TOD has an outstanding mixing performance. By widening the surface area of contact and enhancing the chaotic advection phenomenon, TOD shows an excellent mixing performance at both a high and low Reynolds number, making it a promising micromixer design. For Re > 5, the mixing indexes of TOD are all beyond 90%.
在这项工作中，提出了一种基于拓扑优化的蛇形混合单元模型，以增强水平和垂直方向的逆流。两个方向上逆流的增加可以增强混沌平流现象，导致混合指数迅速增加。所提出的混合单元模型应用于T形微混合器中，以创建一种名为TOD的新型微混合器设计。使用Comsol Multiphysics软件对TOD进行数值模拟，以分析液体流动、混合表面和压降的特性。模拟结果证实TOD具有出色的混合性能。通过扩大接触表面积并增强混沌平流现象，TOD在高雷诺数和低雷诺数下均表现出优异的混合性能，使其成为一种有前景的微混合器设计。对于Re>5，TOD的混合指数均超过90%。
