The subgrid-scale estimation model in the physical space representation

Physics of Fluids - Tập 11 Số 8 - Trang 2330-2342 - 1999
J. Andrzej Domaradzki1, Kuo-Chieh Loh1
1Department of Aerospace Engineering, University of Southern California, Los Angeles, California 90089-1191

Tóm tắt

The subgrid-scale estimation procedure for large eddy simulations developed previously in the spectral (Fourier) representation is extended to the physical space representation. The procedure provides an estimate of the unfiltered velocity field appearing in the definition of the subgridscale stress tensor and consists of two steps. In the deconvolution step an approximate inversion of the filtering operation is performed. Subsequently, the nonlinear step is used to generate a range of subgrid scales on a mesh two times smaller than the mesh employed for a discretization of the resolved quantities. The modeling procedure is evaluated by comparing results of large eddy simulations of turbulent channel flow with the corresponding results of direct numerical simulations, experiments, and other large eddy simulations.

Từ khóa


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