| タイトル | A dynamic subgrid-scale eddy viscosity model |
| 著者（英） | Moin, Parviz; Cabot, William H.; Germano, Massimo; Piomelli, Ugo |
| 著者所属（英） | Politecnico di Torino |
| 発行日 | 1990-12-01 |
| 言語 | eng |
| 内容記述 | 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 field 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 (Germano 1990) 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. |
| NASA分類 | FLUID MECHANICS AND HEAT TRANSFER |
| レポートNO | 92N30649 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/230867 |
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