Numerical simulation of mixing performance of composite phyllotaxy microfluidic channel

Micromixing technology has a broad application prospect in the fields of microchemistry, biomedicine, and new energy due to its features of small sample size, low consumption, high mixing efficiency, and ease of integration. The micro-mixer design used in current research usually fails to take into account the design complexity and mixing efficiency, and lacks the related mechanism research based on the application-oriented. The use of numerical simulation can refine the mixing process and help to mechanistically analyze the results. In this work, a mutualistic-rotational inwardly oriented composite phyllotaxy microchannel model was developed. Through the simulation results of the flow velocity field, pressure field and particle distribution in the microchannel, the diversion and obstruction effects of the structural elements were analyzed, and the influences of their angle, spacing and circulation density on the fluid flow pattern and mixing effect in the microchannel were discussed. The results showed that the fluid velocity vector played a key role in the flow pattern and mutual diffusion of different fluids, and was the decisive criterion of mixing effect. Among them, the component angle mainly affected the directional difference of the fluid velocity vector, the component spacing determines the degree of fluid-field coupling in neighboring regions of action, and the component circulating density mainly affected the change magnitude in the direction of the fluid velocity vector, it was finally concluded that the mixing effect was able to reach 98% when the angle was 45°, the spacing was 2mm, and the circulation density was 4. © 2024 Chemical Industry Press Co., Ltd.. All rights reserved.