V.G.Kuzmenko 3D numerical modelling of turbulent boundary layer in the regime of developed roughness on the basis of LES-technique |
Applied hydromechanics, Vol. 4 (76) ¹ 3, (2002) |
| The fully rough turbulent boundary layer on a flat plate, with zero pressure gradient, is simulated numerically by LES-technique for a Reynolds number of 105. The large-scale flow field has been obtained by directly integrating the filtered three-dimensional time-dependent incompressible Navier-Stokes equations using a finite-difference method. The small-scale motions were parametrized by an "mixed" model. The "top-hat" filter in physical space was used with second-order-accurate scheme. The simulation were performed to study the mean velocity, the total turbulent stresses, the resolved turbulent stresses, the turbulence kinetic energy and subgrid-scale-model effects. The agreement of the computer mean-velocity profile and turbulence statistics with experimental data is good. |
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KEY WORDS: *** |
| TEXT LANGUAGE: Russian |