Novel Micromixer with Complex 3D-Shape Inner Units: Design, Simulation and Additive Manufacturing  

作　　者：Di Wang Guangzhao Ye Jingming Mai Xiaomin Chen Yongqiang Yang Yang Li Xiaojun Chen Jie Chen 

机构地区：[1]School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou,510640,China [2]Department of Electrical Engineering and Information Technology,Karlsruhe Institute of Technology,Karlsruhe,76131,Germany

出　　处：《Computer Modeling in Engineering & Sciences》2020年第6期1061-1077,共17页工程与科学中的计算机建模（英文）

基　　金：supported by the National Natural Science Foundation of China(51775196);Guangdong Province Science and Technology Project(2017B090912003,2017B090911014);High-level Personnel Special Support Plan of Guangdong Province(2016TQ03X289);Guangzhou Star of Pearl River Talent Project(201710010064);the Fundamental Research Funds for the Central Universities(Project Nos.2018ZD30,2019MS060);Guangzhou Science and Technology Project(201704030097).

摘　　要：In this paper,a novel micromixer with complex 3D-shape inner units was put forward and fabricated by metal Additive Manufacturing(AM).The design of the micromixer combined the constraints of selective laser melting technology and the factors to improve mixing efficiency.Villermaux-Dushman reaction system and Compute Fluid Design(CFD)simulation were conducted to investigate the performance and the mechanism of this novel micromixer to improve mixing efficiency.The research found that the best mixing efficiency of this novel micromixer could be gained when the inner units divided fluid into five pieces with a uniform volume.Compared with a conventional micromixer without obstacle in the channel,the micromixer designed in this research achieved higher mixing efficiency and reduce the pressure drop by 10.34%.The mixing behaviour in this novel micromixer was discussed,which mainly contains two types:collisions and swirls.Via collisions,the fluid micro masses would hit each other directly,which broke the boundaries of micro masses and promoted the interchange of species in the whole flow field.In swirls,the fluid micro masses were drawn into thin and long slices,which increased the size of the contact area and enhanced molecule diffusion.Finally,the application scheme of this novel micromixer was briefly discussed.

关 键 词：Additive manufacturing(AM) MICROMIXER computational fluid dynamics(CFD) selective laser melting(SLM) 

分 类 号：TV1[水利工程]