On coarse-grained simulations of turbulent material mixing

被引：5

作者：

Grinstein, F. F. ^{[1
]}

Gowardhan, A. A. ^{[1
]}

Ristorcelli, J. R. ^{[1
]}

Wachtor, A. J. ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

PHYSICA SCRIPTA | 2012年 / 86卷 / 05期

关键词：

LARGE-EDDY SIMULATION; RICHTMYER-MESHKOV INSTABILITY; INITIAL CONDITIONS; RAYLEIGH-TAYLOR; FLOW; DEPENDENCE; EVOLUTION; VORTICITY; SCHEMES; GROWTH;

D O I：

10.1088/0031-8949/86/05/058203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Under-resolved computer simulations are typically unavoidable in many practical turbulent flow applications exhibiting extreme geometrical complexity and broad ranges of length and time scales. In such applications, coarse-grained simulation (CGS) becomes the effective simulation strategy, mostly by necessity rather than by choice. In CGS strategies, resolved/unresolved scale separation is assumed possible, large energy-containing structures are mostly resolved, smaller structures are spatially filtered out and unresolved subgrid effects are modeled; this includes classical large-eddy simulation (LES) strategies with the explicit use of closure subgrid scale models and implicit LES, relying on subgrid modeling implicitly provided by physics-capturing numerical algorithms. Predictability issues in CGS of under-resolved mixing of material scalars driven by under-resolved velocity fields and initial conditions are addressed in this paper, and shock-driven turbulent mixing is a particular focus.

引用

页数：28

共 87 条

[1]

Alin N, 2010, IMPLICIT LARGE EDDY

[2] A SIMPLE EXPERIMENT TO INVESTIGATE 2-DIMENSIONAL MIXING BY RAYLEIGH-TAYLOR INSTABILITY [J].