Large eddy simulations of mixing time in a stirred tank

被引：41
|
作者：
Min, J [1 ]
Gao, ZM [1 ]
机构：
[1] Beijing Inst Chem Technol, Coll Chem Engn, Beijing 100029, Peoples R China
来源：
CHINESE JOURNAL OF CHEMICAL ENGINEERING | 2006年 / 14卷 / 01期
关键词：
large eddy simulations; subgrid scale model; mixing time; hydrofoil impeller;
D O I：
10.1016/S1004-9541(06)60030-X
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
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 Smagorinsky-Lilly subgrid scale model. The impeller rotation was modeled using the sliding mesh technique. Better agreement 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.
引用
收藏
页码：1 / 7
页数：7
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