Subgrid-Scale Stress Modelling Based on the Square of the Velocity Gradient Tensor |
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Authors: | F Nicoud F Ducros |
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Institution: | (1) CERFACS – Centre Européen de Recherche et de Formation, Avancée en Calcul Scientifique 42, Avenue Gaspard Coriolis, 31057 Toulouse Cedex, France |
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Abstract: | A new subgrid scale model is proposed for Large Eddy Simulations in complex geometries. This model which is based on the square of the velocity gradient tensor accounts for the effects of both the strain and the rotation rate of the smallest resolved turbulent fluctuations. Moreover it recovers the proper y
3 near-wall scaling for the eddy viscosity without requiring dynamic procedure. It is also shown from a periodic turbulent pipe flow computation that the model can handle transition. |
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Keywords: | turbulence large eddy simulations wall-bounded flow unstructured mesh transition |
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