Study on macro-instability in stirred tank  

作　　者：刘作华 陶长元 宁伟征 孙瑞祥 

机构地区：[1]College of Chemistry and Chemical Engineering,Chongqing University

出　　处：《化工进展》2010年第S1期680-685,共6页Chemical Industry and Engineering Progress

基　　金：financially supported by Natural Science Foundation of China(20806095);ScientificResearch Foundation for the Returned Overseas Chinese Scholars,State Education Ministry(教外司留20091341-2);China Postdoctoral Science Foundation(20080430747);National High Technology Researchand Development Program of China(2008AA031202)

摘　　要：Macro-instability(MI)is an important natural phenomenon affecting the mixing performance in stirred tank significantly,which results from movement and evolution of large eddies.Factors associated with MI frequency in mixing operation and energy dissipation related to MI were reviewed.Flow pattern in turbulent regime contains many coherent structures,which have much energy vortices and may result in flow field MI.Adjustment of coherent structure and controlling MI may contribute to energy saving and good mixing performance.Controlling methods for MI was prospected.Macro-instability(MI)is an important natural phenomenon affecting the mixing performance in stirred tank significantly,which results from movement and evolution of large eddies.Factors associated with MI frequency in mixing operation and energy dissipation related to MI were reviewed.Flow pattern in turbulent regime contains many coherent structures,which have much energy vortices and may result in flow field MI.Adjustment of coherent structure and controlling MI may contribute to energy saving and good mixing performance.Controlling methods for MI was prospected.

关 键 词：MACRO-INSTABILITY CHAOTIC MIXING stirred TANK COHERENT structure 

分 类 号：TQ051.72[化学工程]