V.G.Kuzmenko The simulation of unsteady turbulent flow with obstacle on the base of hybrid LES/URANS-approach |
Applied hydromechanics, Vol. 15 (87) ¹ 2, (2013) |
| The unsteady three-dimensional turbulent incompressible flow over a rectangular two-dimensional fence on flat plate in a boundary layer with free-stream turbulence is simulated using hybrid LES/URANS-approach, wall models and finite-difference method. The aspect ratio (height/length) of the fence are 4, fence Reynolds number of 50000, inflow Reynolds number of 24722 for turbulent boundary layer, parameter free-stream turbulence 0.004. The number of grid points used in the numerical method was 2883591. The flow near the walls is simulated by URANS with K-ε-πij turbulence model. The simulation were performed to study the mean velocity, instantaneous streamlines, velocity vectors, vorticity, z-averaged, time-averaged and ensemble-averaged streamlines. |
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KEY WORDS: hybrid LES/URANS-approach, numerical simulation, three-dimensional turbulent flow, boundary layer |
| TEXT LANGUAGE: Russian |