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Large Eddy Simulations of Mixing Time in a Stirred Tank
被引：2
作者：
闵健
高正明
机构：
[1] College of Chemical Engineering Beijing University of Chemical Technology Beijing 100029 China
[2] College of Chemical Engineering Beijing University of Chemical Technology Beijing 100029 China
关键词：
large eddy simulations;
subgrid scale model;
mixing time;
hydrofoil impeller;
D O I：
暂无
中图分类号：
TQ021 [基础理论];
学科分类号：
081701 ;
081704 ;
摘要：
Large eddy simulations (LES) of mixing process in a stirred tank of 0.476m diameter with a 3-narrow blade hydrofoil CBY impeller were reported. The turbulent flow field and mixing time were calculated using LES with Sma-gorinsky-Lilly subgrid scale model. The impeller rotation was modeled using the sliding mesh technique. Better agree-ment of power demand and mixing time was obtained between the experimental and the LES prediction than that by the traditional Reynolds-averaged Navier-Stokes (RANS) approach. The curve of tracer response predicted by LES was in good agreement with the experimental. The results show that LES is a reliable tool to investigate the unsteady and quasi-periodic behavior of the turbulent flow in stirred tanks.
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页码：1 / 7
页数：7
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