V.G.Kuzmenko Simulation of turbulent flow with separation beyond backward-facing step |
Applied hydromechanics, Vol. 9 (81) ¹ 4, (2007) |
| The turbulent flow with separation after backward-facing step is simulated by LES-technique for step Reynolds number of 3850 and inflow Reynolds number of 7623 for turbulent boundary layer. 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 dynamic subgrid-scale mixed model. The number of grid points used in the numerical method was {337 ? 145 ? 145}. The simulation were performed to study the mean velocity, the turbulent stresses, the turbulence kinetic energy, subgrid-scale-model effects, mean wall pressure coefficient, mean wall-skin friction coefficient, mean re-attachment length and mean size recirculation region. There is good agreement between the computer mean-velocity profiles, turbulence statistics and experimental data. |
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KEY WORDS: *** |
| TEXT LANGUAGE: Russian |