V.G.Kuzmenko The simulation of separated turbulent flow. Part 1. Identification of coherent structure energy |
Applied hydromechanics, Vol. 18 (90) ¹ 2, (2016) |
| The unsteady three-dimensional turbulent incompressible flow over a rectangular two-dimensional fence in the boundary layer is simulated using the hybrid LES/URANS-approach, wall models and finite-difference method. The aspect ratio (height/length) of the fence is 4, the fence Reynolds number Re is 10500, the inflow Reynolds number is Reδ=10500 for the turbulent boundary layer. The large-scale coherent structures are identified by the Q-criterion (set of the threshold values {Qsi} for total numerical domain). The simulation was performed to study the Q-isosurfaces and integral energy characteristic. The coherent structures of various configurations were identified in wide numerical range. |
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KEY WORDS: turbulent boundary layer, fence, numerical method, coherent structures, identification criterion |
| TEXT LANGUAGE: Russian |