V.G.Kuzmenko The simulation of turbulent wall flow with a fence on the base of hybrid LES/RANS-approach |
Applied hydromechanics, Vol. 13 (85) ¹ 3, (2011) |
| The three-dimensional turbulent incompressible flow over a rectangular two-dimensional fence on flat plate in a boundary layer with or without of free-stream turbulence is simulated using hybrid LES/RANS-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 2065551. The flow near the walls is simulated by RANS with K-ε-πij turbulence model. The simulation were performed to study the mean velocity, the turbulent stresses, stream lines, wall-skin friction coefficient and reattachment length. |
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KEY WORDS: three-dimensional turbulent flow, LES/RANS-approach, finite-difference method |
| TEXT LANGUAGE: Russian |