文献类型：期刊文献

英文题名：Design and evaluation of an easily fabricated micromixer with three-dimensional periodic perturbation

作者：Lin, Ying[1];Yu, Xinhai[1];Wang, Zhenyu[2];Tu, Shan-Tung[1];Wang, Zhengdong[1]

机构：[1]E China Univ Sci & Technol, Key Lab Pressurized Syst & Safety, Minist Educ, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]Peking Univ, Sch Software & Microelect Wuxi, Wuxi 214125, Peoples R China

年份：2011

卷号：171

期号：1

起止页码：291

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20112214020735);WOS:【SCI-EXPANDED(收录号:WOS:000292075000032)】；

基金：This study was financially supported by the China Natural Science Foundation (No. 20606011) and Key Projects in the National Science and Technology Pillar Program during the Eleventh Five-Year Plan Period (No. 2009BAF40B02).

语种：英文

外文关键词：Micromixer; Simulation; Fabrication; Stretching; Mixing index; Villermaux/Dushman method

摘要：A novel passive micromixer was developed for microchemical applications. The flow path of the proposed micromixer was characterized by the combination of a square-wave structure and periodic cubic grooves. This micromixer can be easily fabricated by conventional mechanical processing. The simulation on computational fluid dynamics showed that the square-wave structure caused laminar recirculation, and the cubic grooves induced flow stretching. These two chaotic advection mechanisms jointly contributed to the 3D periodic perturbation, resulting in considerably enhanced mixing over a wide range of the Reynolds number. The structural parameters of the micromixer were optimized in the simulation, with groove location taken as the key variable. The overall performance, including the mixing quality and pressure drop, of the optimum micromixer was experimentally evaluated and compared with those of five commercial micromixers presented in the literature. Experimental results demonstrated the superiority of the micromixer proposed in the current study. (C) 2011 Elsevier B.V. All rights reserved.