An hybrid RANS/LES model for simulation of complex turbulent flow

被引：0
|
作者：
Qun Wei
Hong-xun Chen
Zheng Ma
机构：
[1] Shanghai University,Shanghai Institute of Applied Mathematics and Mechanics
[2] Nanchang University,School of Civil Engineering and Architecture
[3] China Ship Scientific Research Center,undefined
来源：
Journal of Hydrodynamics | 2016年 / 28卷
关键词：
turbulence model; non-linear eddy viscosity model (NLEVM); hybrid Reynolds averaged Navier-Stokes/large eddy simulation (RANS/LES);
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A non-linear eddy viscosity model (NLEVM) and a scalable hybrid Reynolds averaged Navier-Stokes/ large eddy simulation (RANS/LES) strategy are developed to improve the capability of the eddy viscosity model (EVM) to simulate complex flows featuring separations and unsteady motions. To study the performance of the NLEVM, numerical simulations around S809 airfoil are carried out and the results show that the NLEVM performs much better when a large separation occurs. Calculated results of the flow around a triangular cylinder show that the NLEVM can improve the precision of the flow fields to some extents, but the error is still considerable, and the small turbulence structures can not be clearly captured as the EVM. Whereas the scalable hybrid RANS/LES model based on the NLEVM is fairly effective on resolving the turbulent structures and can give more satisfactory predictions of the flow fields.
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页码：811 / 820
页数：9
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