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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NASA, John H Glenn Res Ctr Lewis Field, Combust Branch, Cleveland, OH 44135 USANASA, John H Glenn Res Ctr Lewis Field, Combust Branch, Cleveland, OH 44135 USA
Liu, NS
Shih, TH
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NASA, John H Glenn Res Ctr Lewis Field, Combust Branch, Cleveland, OH 44135 USANASA, John H Glenn Res Ctr Lewis Field, Combust Branch, Cleveland, OH 44135 USA
机构:
City Univ Hong Kong, Dept Bldg & Construct, Kowloon, Hong Kong, Peoples R China
Univ Sci & Technol China, Sch Engn Sci, Hefei 230026, Peoples R ChinaCity Univ Hong Kong, Dept Bldg & Construct, Kowloon, Hong Kong, Peoples R China
Huang, S. H.
Li, Q. S.
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City Univ Hong Kong, Dept Bldg & Construct, Kowloon, Hong Kong, Peoples R ChinaCity Univ Hong Kong, Dept Bldg & Construct, Kowloon, Hong Kong, Peoples R China
Li, Q. S.
Wu, J. R.
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City Univ Hong Kong, Dept Bldg & Construct, Kowloon, Hong Kong, Peoples R ChinaCity Univ Hong Kong, Dept Bldg & Construct, Kowloon, Hong Kong, Peoples R China