Retrospect and Perspective of Micro-mixing Studies in Stirred Tanks

作     者：程景才 冯鑫 程荡 杨超 

作者机构：Key Laboratory of Green Process and EngineeringInstitute of Process EngineeringChinese Academy of Sciences 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2012年第20卷第1期

页      面：178-190页

核心收录：

学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 081701[工学-化学工程] 

基　　金：Supported by the State Key Development Program for Basic Research of China (2010CB630904) the National Natural Science Fund for Distinguished Young Scholars (21025627) the National Natural Science Foundation of China (21106154,20990224) the National High Technology Research and Development Program of China (2011AA060704) the Beijing Natural Science Foundation (2112038) and Jiangsu Province Project (BY2009133) 

主　　题：micro-mixing multiphase micro-mixing model stirred tank computational fluid dynamics 

摘      要：Mixing problems are most likely encountered and sometimes can be severe in scaling-up projects. Micro-mixing is an important aspect for fast or quasi-instantaneous reactions. Poor micro-mixing might produce more undesired by-products, leading to higher purification costs. This paper gives an extensive review and analysis of micro-mixing studies in single- and multi phase stirred tanks. The relevant experiment techniques, micro-mixing models and nurherical approaches are critically reviewed and analyzed with remarks and perspectives. The reported studies on two-phase micro-mixing experiments and on the impact of the presence of the dispersed phases on turbulence have been limited to a narrow range of conditions. More importantly, disparities widely exist among different reports. Both Lagrangian and Eulerian models are based on oversimplified assumptions, which may lead to uncertainties or even unrealistic results. A heuristic model, which is from the perspective of CFD （computational fluid dynamics） and can cover the whole spectrum of scales and also focus on every subrocess, is desired in the future.