NUMERICAL SIMULATION OF PASSIVE MICROMIXER WITH NOVEL OBSTACLE STRUCTURE

Zhongli Wu, Heng Xu, Haijun Du, Yu Li, Lei Xu and Daohai Zhang ()
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Zhongli Wu: School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, P. R. China
Heng Xu: School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, P. R. China
Haijun Du: School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, P. R. China
Yu Li: ��Faculty of Mechanical Engineering and Automation, Liaoning University of Technology, Jinzhou, 121001, P. R. China
Lei Xu: School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, P. R. China
Daohai Zhang: School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, P. R. China

Surface Review and Letters (SRL), 2023, vol. 30, issue 12, 1-16

Abstract: The micromixer is an important prerequisite for realizing the function of the microfluidic chip system. Micromixers are mainly used in protein crystallization, biological reactions, drug delivery and other fields. Efficient micromixers enable fast bioreaction processes. In this paper, according to the principle of plane geometry, micromixers with three different structural obstacles, circular, equilateral triangle and square, are designed to study how to improve the mixing efficiency of the micromixer. In this paper, the influence of the obstacle structure on the mixing efficiency and pressure drop of the micromixer is analyzed. Through numerical simulation, the results show that when Re = 100, the mixing efficiency of the circular obstacle micromixer is up to 97.4%, and the pressure drop is 15,789.597 Pa. In addition, this paper analyzes that the use of cylindrical obstacles can make the fluid generate horizontal and vertical vortex flow, break the usual laminar flow, and significantly improve the mixing efficiency.

Keywords: Passive micromixers; obstacles; circumscribed circular; mixing index; pressure drop (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1142/S0218625X23500877

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