Direct Numerical and Large Eddy Simulations of Helicity-Induced Stably Stratified Turbulent Flows

被引：0
|
作者：
Rahimi, A. [1 ]
Chandy, A. J. [1 ]
机构：
[1] Univ Akron, Dept Mech Engn, Akron, OH 44325 USA
来源：
ADVANCES IN COMPUTATION, MODELING AND CONTROL OF TRANSITIONAL AND TURBULENT FLOWS | 2016年
关键词：
Turbulence; Stratification; Helicity; large eddy simulation;
D O I：
暂无
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Subgrid-scale (SGS) turbulence models for large eddy simulations (LES) are quantitatively assessed for the strongly-stratified helical transition-to-turbulence, Arnold-Beltrami-Childress (ABC) problem through comparisons to in-house direct numerical simulations (DNS). LES predictions using the classical non-dynamic and dynamic Smagorinsky models (SSM and DSM, respectively) are compared to a modified Smagorinsky model (MSM) designed specifically for natural convection. DSM predicts the best results when compared to DNS, although none of the SGS models are able to predict the peak of nonlinearities.
引用
收藏
页码：340 / 348
页数：9
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