A further study of numerical errors in large-eddy simulations

被引：189

作者：

Chow, FK ^{[1
]}

Moin, P

机构：

[1] Stanford Univ, Dept Civil & Environm Engn, Environm Fluid Mech Lab, Stanford, CA 94305 USA

[2] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA

来源：

JOURNAL OF COMPUTATIONAL PHYSICS | 2003年 / 184卷 / 02期

基金：

美国国家科学基金会;

关键词：

LES; large-eddy simulation; numerical error analysis; turbulence;

D O I：

10.1016/S0021-9991(02)00020-7

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

Numerical errors in large-eddy simulations (LES) arise from aliasing and discretization errors, and errors in the subfilter-scale (SFS) turbulence model. Using a direct numerical simulation (DNS) dataset of stably stratified shear flow to perform a priori tests, we compare the numerical error from several finite difference schemes to the magnitude of the SFS force. This is an extension of Ghosal's analysis [J. Comput. Phys. 125 (1996) 187] to realistic flow fields. By evaluating different grid resolutions as well as different filter-grid ratios, we provide guidelines for LES: for a second-order finite difference scheme, a filter-grid ratio of at least four is desired; for a sixth-order Pade scheme, a filter-grid ratio of two is sufficient. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：366 / 380

页数：15

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