Simulation and experimental study of asymmetric split and recombine micromixer with D‐shaped sub‐channels. (6th March 2019)

• Record Type: Journal Article
• Authors: He, Xiuhua; Xia, Tian; Gao, Linfeng; Deng, Zhidan; Uzoejinwa, Benjamin B.
• Is Part Of: Micro & nano letters. Volume 14:Number 3(2019)
• Page Start: 293
• Page End: 298
• Publication Date: 2019-03-06
• Subjects: microchannel flow -- flow simulation -- numerical analysis -- vortices -- mixing -- computational fluid dynamics -- laminar flow; microfluidic system -- geometrical parameters -- CFD software ANSYS CFX -- D‐shaped mixing channel -- mixed fluid -- mixing efficiency -- recombine micromixer -- passive micromixer -- Reynolds number -- channel flow -- Dean vortices -- asymmetric split micromixer; Nanotechnology -- Periodicals; Nanostructures -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1049/mnl.2018.5219
• Languages: English
• ISSNs: 1750-0443

Abstract

Abstract : An effective passive micromixer based on the principles of asymmetric split and recombine has been designed, developed, and investigated to enhance the mixing performance of the micromixer in a microfluidic system. The effects of geometrical parameters and the number of mixing units on mixing performance were studied at different Reynolds (Re) number (ranging from 1 to 80) via CFD software ANSYS CFX. The results revealed that the preferable number of mixing units is 6, and the optimal direction of reducer is opposite to the main channel flow; the D‐shaped mixing channel forces the mixed fluid to produce the extended vortex and Dean vortices simultaneously which caused a strong collision at the confluence of fluids, thus leading to the superposition and enhancement of the vortex system; when Re number is 80 and the width ratio of mixing channel W 2/ W 3 = 1, the mixing efficiency of micromixer can exceed 95%.