Tomaras George, Kothapalli Chandrasekhar R, Fodor Petru S
Department of Physics, Cleveland State University, 2121 Euclid Avenue, Cleveland, OH 44236, USA.
Department of Chemical and Biomedical Engineering, Cleveland State University, 2121 Euclid Avenue, Cleveland, OH 44236, USA.
Micromachines (Basel). 2022 Oct 20;13(10):1785. doi: 10.3390/mi13101785.
Computational fluid dynamics modeling was used to characterize the effect of the integration of constrictions defined by the vertices of hyperbolas on the flow structure in microfluidic serpentine channels. In the new topology, the Dean flows characteristic of the pressure-driven fluid motion along curved channels are combined with elongational flows and asymmetric longitudinal eddies that develop in the constriction region. The resulting complex flow structure is characterized by folding and stretching of the fluid volumes, which can promote enhanced mixing. Optimization of the geometrical parameters defining the constriction region allows for the development of an efficient micromixer topology that shows robust enhanced performance across a broad range of Reynolds numbers from = 1 to 100.
计算流体动力学建模用于表征由双曲线顶点定义的收缩结构整合对微流控蛇形通道内流动结构的影响。在新的拓扑结构中，压力驱动流体沿弯曲通道运动的迪恩流与收缩区域中产生的拉伸流和不对称纵向涡流相结合。由此产生的复杂流动结构的特征是流体体积的折叠和拉伸，这可以促进增强混合。定义收缩区域的几何参数的优化允许开发一种高效的微混合器拓扑结构，该结构在从1到100的广泛雷诺数范围内表现出强大的增强性能。
