V.G.Kuzmenko The numerical 3D modelling of turbulent boundary layer in the regime of intermediate roughness |
Applied hydromechanics, Vol. 5 (77) ¹ 2, (2003) |
| The methodology of Large Eddy Simulation (LES) is presented. The transitionally rough turbulent boundary layer on a flat plate is simulated 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 number of grid points used in the economical numerical method was 513. 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. There is good agreement between the computer mean-velocity profile, turbulence statistics and experimental data. |
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| TEXT LANGUAGE: Russian |