V.G.Kuzmenko The simulation of turbulent flow with the fence by different external conditions. Part 2. Coherent structures identification |
Applied hydromechanics, Vol. 17 (89) ¹ 3, (2015) |
| The unsteady three-dimensional turbulent incompressible flow over a rectangular two-dimensional fence in a boundary layer 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 Re are 10500, inflow Reynolds number are Reδ={10500; 31500; 52500} for turbulent boundary layer. Many different vortex identification criteria are analysed. The large-scale coherent structures are identified by the Q-criterion (set of threshold value {Qsi} for total numerical domain). The simulation were performed to study the Q-isolines for three inflow Reynolds number. The coherent structures of different configurations were identified. |
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KEY WORDS: turbulent boundary layer, fence, numerical method, large-scale coherent structures, identification criterion |
| TEXT LANGUAGE: Russian |