A dynamic subgrid-scale eddy viscosity model

AIP Publishing - Tập 3 Số 7 - Trang 1760-1765 - 1991
Massimo Germano1, Ugo Piomelli1, Parviz Moin1, W. Cabot1
1Center for Turbulence Research, Stanford, California 94305

Tóm tắt

One major drawback of the eddy viscosity subgrid-scale stress models used in large-eddy simulations is their inability to represent correctly with a single universal constant different turbulent fields in rotating or sheared flows, near solid walls, or in transitional regimes. In the present work a new eddy viscosity model is presented which alleviates many of these drawbacks. The model coefficient is computed dynamically as the calculation progresses rather than input a priori. The model is based on an algebraic identity between the subgrid-scale stresses at two different filtered levels and the resolved turbulent stresses. The subgrid-scale stresses obtained using the proposed model vanish in laminar flow and at a solid boundary, and have the correct asymptotic behavior in the near-wall region of a turbulent boundary layer. The results of large-eddy simulations of transitional and turbulent channel flow that use the proposed model are in good agreement with the direct simulation data.

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Tài liệu tham khảo

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AIP Publishing

Tập 3 Số 7

1760-1765

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