Scalar dispersion by a large-eddy simulation and a Lagrangian stochastic subgrid model

被引：13
|
作者：
Wei, Guoxin [1 ]
Vinkovic, Ivana [1 ]
Shao, Liang [1 ]
Simoens, Serge [1 ]
机构：
[1] Univ Lyon 1, Ecole Cent Lyon, INSA,LMFA, CNRS,UMR 5509, F-69131 Ecully, France
来源：
PHYSICS OF FLUIDS | 2006年 / 18卷 / 09期
关键词：
D O I：
10.1063/1.2337329
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A hybrid Eulerian-Lagrangian large-eddy simulation (LES) is used to compute scalar dispersion in a turbulent flow. Instead of resolving the passive scalar transport equation, fluid particles are tracked in a Lagrangian way. In order to obtain the subgrid scale velocity component of fluid particles, a Lagrangian stochastic subgrid model is coupled with the Eulerian LES. The Lagrangian stochastic subgrid model is written in terms of subgrid scale statistics. The coupling is applied to the study of turbulent scalar dispersion. The results of our simulation are compared with a direct numerical simulation and with experimental results. (c) 2006 American Institute of Physics.
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页数：11
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