V.G.Kuzmenko Dynamic subgridscale model for LES-technique |
Applied hydromechanics, Vol. 6 (78) ¹ 3, (2004) |
| The turbulent boundary layer on a flat plate is simulated by economical LES-technique for a Reynolds number of 105, using wall model. The small-scale motions were parametrized by dynamic subgrid-scale eddy viscosity model and dynamic subgrid-scale mixed model. In an explicit definition the operation of primary and secondary filtering is described and her representation in a finite-difference form is received. The influence of size of relation of width of the secondary filter to width primary filter on dynamic subgrid-scale factor is investigated. The simulation were performed to study the mean velocity, the total turbulent stresses, the subgrid-scale turbulence energy dissipation and dynamic subgrid-scale coefficient. There is good agreement between the computer mean-velocity profile, turbulence statistics and experimental data. |
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| TEXT LANGUAGE: Russian |