A second-order dynamic subgrid-scale stress model |
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| Authors: | Gong Hongrui Ph Doctor Chen Shiyi He Guowei Cao Nianzhen |
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| Affiliation: | (1) Center for Adaptive Systems Application, Inc, 1911 Central, 87544 Los Alamos, NM, USA;(2) Center for Nonlinear Studies, Los Alamos National Laboratory, 87545 Los Alamos, NM, USA;(3) Loboratory for Nonlinear Mechanics, Institute of Mechanics, Academia Sinica, 100080 Beijing, P R china |
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| Abstract: | A second-order dynamic model based on the general relation between the subgrid-scale stress and the velocity gradient tensors was proposed. A priori test of the second-order model was made using moderate resolution direct numerical simulation date at high Reynolds number (Taylor microscale Reynolds number Rλ=102–216) for homogeneous, isotropic forced flow, decaying flow, and homogeneous rotating flow. Numerical testing shows that the second-order dynamic model significantly improves the correlation coefficient when compared to the first-order dynamic models. Foundation item: Department of Energy at Los alamos National Laboratory Biography: Gong Hongrui(1963-) He Guowei: corresponding author |
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| Keywords: | turbulent flow dynamic model subgrid_scale stress model Smagorinsky model |
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