文献类型：期刊文献

英文题名：Large eddy simulation of the gas-liquid flow in a stirred tank

作者：Zhang, Yanhong[1,3];Yang, Chao[1,2];Mao, Zai-Sha[1]

机构：[1]Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China;[2]Jiangsu Inst Marine Resource Exploitat, Lianyungang 222005, Peoples R China;[3]E China Univ Sci & Technol, Sch Mech Engn, Minist Educ, Key Lab Safety Sci Pressurized Syst, Shanghai 200237, Peoples R China

年份：2008

卷号：54

期号：8

起止页码：1963

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20083311457844);WOS:【SCI-EXPANDED(收录号:WOS:000258388400002)】；

语种：英文

外文关键词：large eddy simulation; gas-liquid flow; stirred tank; computational fluid dynamics; turbulence

摘要：Both the large eddy simulation (LES) technique and the k-epsilon turbulent model were used to simulate the gas-liquid turbulent flow in a stirred tank driven by a Rushton impeller. A Eulerian-Eulerian two-fluid model for gas-liquid two-phase flow, was developed using the large eddy,v simulation for both gas (aid liquid phases. The relative baffles was accounted for through the movement of the rotating impeller to the static baffles 'improved inner-outer iterative algorithm. The spatial discretization of the governing equations was performed on a cylindrical staggered grid. For the LES, a conventional Sniagorinsky,v sub-grid model was adapted to modeling the turbulence of the liquid phase. The momentum and continuity equations were discretized using the finite diffrence method, ",ij'h a third order QUICK (Quadratic Upwind Interpolation tor Convective Kinematics) scheme used for convective terms. The phase-resolved predictions of the LES were compared with the experimental data and the simulation results by the standard k-epsilon model, suggesting that the LES has much better accuracy than the k-epsilon model. (c) 2008 American Institute of Chemical Engineers.