V.G.Kuzmenko Numerical modelling of nonstationary turbulent flow with seperation over and inside cavity |
Applied hydromechanics, Vol. 11 (83) ¹ 3, (2009) |
| The three-dimensional turbulent incompressible flow over a rectangular two-dimensional cavity in a channel is investigated using LES-technique and wall model. The aspect ratio (length/depth) of the cavity is 2, cavity Reynolds number of 3360 and inflow Reynolds number of 20450 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 2192103. The simulation were performed to study the mean velocity, phase-averaged velocity, the turbulent stresses, the turbulence kinetic energy and subgrid-scale-model effect. There is good agreement between the computer mean-velocity profiles, turbulence statistics and experimental data. |
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| TEXT LANGUAGE: Russian |