Laminar Fluid Mixing in Micromixers: Description of Pull-Push Effects,Chemical Engineering & Technology

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Laminar Fluid Mixing in Micromixers: Description of Pull-Push Effects
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2021-11-02 , DOI: 10.1002/ceat.202100193
Arash Haghighinia ₁ , Salman Movahedirad ₁ , Babak Kamali Doust Azad ₂

Affiliation

A numerical study was performed on laminar mixing of fluids by means of embedded microbarriers against the flow direction in two three-dimensional T-micromixers. Two microchannels with different obstacle arrangements were considered, and the effect of volumetric flow rate Q on two-stream pull-push motion was investigated. With increasing Q and distance of the barriers to the sidewalls K, different vortices and fluid movement patterns develop in the two micromixers. Maximum mass transfer is obtained for the micromixer with smaller K value. With decreasing K, pull-push movement strongly affects fluid merging, and the quality of mixing increases. Moreover, the effect of fluid tortuosity was studied, and a direct relationship between hydrodynamic fluid tortuosity and mass transfer was found.

中文翻译：

微混合器中的层流流体混合：拉推效应的描述

在两个三维 T 型微混合器中，通过嵌入的微屏障逆着流动方向对流体的层流混合进行了数值研究。考虑了具有不同障碍物布置的两个微通道，并研究了体积流速Q对两流拉-推运动的影响。随着Q和壁垒到侧壁K 的距离的增加，两个微混合器中会产生不同的涡流和流体运动模式。对于具有较小K值的微混合器，可获得最大的传质。随着K 的减小，推拉运动强烈影响流体合并，并且混合质量增加。此外，研究了流体曲折度的影响，并发现了流体动力流体曲折度与传质之间的直接关系。

更新日期：2021-12-16

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