Research on fluid motion characteristics and structural evolution in reciprocating mixing tanks  

作　　者：Li Wang Shibo Wang Huiqiang Yang Yuling Zhai Jianxin Xu 

机构地区：[1]Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction,Ministry of Education,Kunming 650093,China [2]Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China

出　　处：《Chinese Journal of Chemical Engineering》2025年第3期120-134,共15页中国化学工程学报(英文版)

基　　金：National Key Research and Development Program of China(2022YFC3902000);Yunnan Major Scientific and Technological Projects(202202AG050002,202202AG050007);National Natural Science Foundation of China(52166004).

摘　　要：A new stirring method,reciprocating stirring,is developed by incorporating a periodic axial reciprocating motion into conventional stirring.This study employs computational fluid dynamics methods,utilizing volume of fluid and user-defined functions to control and analyze the flow field characteristics in a reciprocating stirred tank.Compared to conventional stirring,reciprocating stirring increases the overall fluid velocity by approximately 7.9%,turbulent kinetic energy(TKE)by 35.9%to 45.6%,and the turbulent dissipation rate by 10.6%to 15.7%.The primary reason is the dynamic integration of multiple flow regions,which enhances fluid interface interactions.Additionally,the study investigates the dynamic evolution of the vortex structure,uncovering the correlation between the impeller's start-stop behavior and the vortex area.The optimal impeller plate designs,forward sine-4/12D and reverse sine-5/12D,were determined based on the effective area of TKE.Reciprocating stirring,in comparison to conventional stirring,enhances secondary flow intensity by 67.3%to 93.7%and shortens mixing time by 56.6%to 173.0%.

关 键 词：Reciprocating stirring Numerical simulation VORTEX Chaotic properties Mixing enhancement 

分 类 号：TQ051.7[化学工程]