Subgrid-scale eddy viscosity model for helical turbulence
Subgrid-scale eddy viscosity model for helical turbulence
复制标题
螺旋湍流的亚网格尺度涡粘模型
DOI:
10.1063/1.4819765
复制
发表时间:
2013-09
影响因子:
4.6
通讯作者:
Shiyi Chen
中科院分区:
文献类型:
--
作者:
Changping Yu;Renkai Hong;Zuoli Xiao;Shiyi Chen
A novel eddy-viscosity closure is proposed for the subgrid-scale (SGS) stress tensor in large-eddy simulation of helical turbulence. The eddy-viscosity is shown to be proportional to the product of the large-scale velocity strain rate tensor and the symmetric part of the large-scale vorticity gradient (or vorticity strain rate tensor) based on a SGS helicity dissipation balance and a spectral relative helicity relation. The new SGS model is first tested and validated in simulation of homogeneous and isotropic helical turbulence. The statistical results demonstrate that the present model can predict both the energy and helicity spectra more precisely than the dynamic Smagorinsky model and a mixed helical model as compared with the results calculated in direct numerical simulation. Then, a compressible version of the new SGS model is parameterized and utilized to simulate the compressible flow past a circular cylinder. It is found that the present eddy-viscosity model can reproduce the skin friction force m...
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影响因子:
4.6
作者:
Yipeng Shi;Zuoli Xiao;Shiyi Chen
通讯作者:
Yipeng Shi;Zuoli Xiao;Shiyi Chen
影响因子:
8.6
作者:
Pelz;Yakhot;Orszag;Shtilman;Levich
通讯作者:
Pelz;Yakhot;Orszag;Shtilman;Levich
影响因子:
3.7
作者:
F. Godeferd;L. Lollini
通讯作者:
F. Godeferd;L. Lollini
影响因子:
4.6
作者:
J. Wallace;J. Balint;L. Ong
通讯作者:
J. Wallace;J. Balint;L. Ong
影响因子:
27.7
作者:
C. Meneveau;J. Katz
通讯作者:
C. Meneveau;J. Katz