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Large eddy simulation of hydrodynamic turbulence using renormalized viscosity
被引:2
|作者:
Vashishtha, Sumit
[1
]
Samuel, Roshan
[2
]
Chatterjee, Anando Gopal
[1
]
Samtaney, Ravi
[3
]
Verma, Mahendra K.
[1
]
机构:
[1] Indian Inst Technol, Dept Phys, Kanpur 208016, Uttar Pradesh, India
[2] Indian Inst Technol, Dept Mech Engn, Kanpur 208016, Uttar Pradesh, India
[3] King Abdullah Univ Sci & Technol, Phys Sci & Engn Div, Thuwal 23955, Saudi Arabia
关键词:
MAGNETOHYDRODYNAMIC TURBULENCE;
ENERGY-TRANSFER;
MODELS;
FLUID;
SCALES;
D O I:
10.1063/1.5096335
中图分类号:
O3 [力学];
学科分类号:
08 ;
0801 ;
摘要:
We employ renormalized viscosity to perform large eddy simulations (LESs) of decaying homogeneous and isotropic turbulence in a cubical domain. We perform a direct numerical simulation (DNS) on 512(3) and 256(3) grids and LES on 32(3), 64(3), and 128(3) grids with the same initial conditions in the resolved scales for a flow with Taylor Reynolds number Re-lambda = 210. We observe good agreement between LES and DNS results for the temporal evolution of turbulence kinetic energy E-u(t), kinetic energy spectrum E-u(k), and kinetic energy flux Pi(u)(k). Also, the large-scale structures of the flow in LES are similar to those in DNS. These results establish the suitability of our renormalized viscosity scheme for LES.
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