A PRIORI EVALUATION OF NON-LINEAR MODELS FOR TURBULENT INCOMPRESSIBLE FLOWS
| Autor: | O. El Yahyaoui, Gilmar Mompean, L. Thais, Hassan Naji |
|---|---|
| Přispěvatelé: | Laboratoire de Génie Civil et Géo-Environnement (LGCgE) - ULR 4515 (LGCgE), Université d'Artois (UA)-Université de Lille-Ecole nationale supérieure Mines-Télécom Lille Douai (IMT Lille Douai), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Institut de Recherche sur les Phénomènes Hors Equilibre (IRPHE), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 1989 |
| Předmět: |
Turbulence
Mathematical analysis Direct numerical simulation Reynolds number Reynolds stress equation model Function (mathematics) Reynolds stress Physics::Fluid Dynamics symbols.namesake [SPI]Engineering Sciences [physics] Classical mechanics symbols Tensor Navier–Stokes equations ComputingMilieux_MISCELLANEOUS Mathematics |
| Zdroj: | SAE International Congress and Exposition SAE International Congress and Exposition, 1989, Detroit, United States. pp.147-156, ⟨10.1016/B978-008044114-6/50013-2⟩ Engineering Turbulence Modelling and Experiments 5 Engineering Turbulence Modelling and Experiments 5, Elsevier, pp.147-156, 2002, ⟨10.1016/B978-008044114-6/50013-2⟩ |
| Popis: | The a priori evaluation of two recent explicit algebraic stress models (EASM) for turbulent flow is presented. The first one is the model proposed by Wallin and Johansson (2000) and the second one is the model proposed by Gatski and Rumsey (2001) . The evaluation was done using the direct numerical simulation (DNS) data of a turbulent flow through a square duct. The results obtained with these two models are shown, commented and compared with the DNS. To compensate the low Reynolds number effect due to the walls, a wall function derived from the Van Driest damping function was introduced in the second model. The evolution of the anisotropy is well predicted and is presented using the maps of second and third invariants of the Reynolds stress tensor. The equilibrium hypothesis used in the deduction of several algebraic models is verified for this turbulent flow. |
| Databáze: | OpenAIRE |
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