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| HAL : hal-00461450, version 1 |
| arXiv : 1009.0127 |
| DOI : 10.1063/1.3121303 |
| Fiche détaillée |  Récupérer au format |
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| Physics of Fluids 21 (2009) 041701 |
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| On the unsteady behavior of turbulence models |
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| Robert Rubinstein 1Wouter J.T. Bos 2 |
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| (2009) |
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| Periodically forced turbulence is used as a test case to evaluate the predictions of two-equation and multiple-scale turbulence models in unsteady flows. The limitations of the two-equation model are shown to originate in the basic assumption of spectral equilibrium. A multiple-scale model based on a picture of stepwise energy cascade overcomes some of these limitations, but the absence of nonlocal interactions proves to lead to poor predictions of the time variation of the dissipation rate. A new multiple-scale model that includes nonlocal interactions is proposed and shown to reproduce the main features of the frequency response correctly. |
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| 1 : | NASA Langley Research Center (LaRC) |
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NASA |
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| 2 : | Laboratoire de Mecanique des Fluides et d'Acoustique (LMFA) |
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CNRS : UMR5509 – Université Claude Bernard - Lyon I – Ecole Centrale de Lyon – Institut National des Sciences Appliquées de Lyon |
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| Domaine | : | Physique/Mécanique/Mécanique des fluides Sciences de l'ingénieur/Mécanique/Mécanique des fluides |
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| flow instability – flow simulation – turbulence |
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| Liste des fichiers attachés à ce document : | ||||||||||
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| hal-00461450, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00461450 | |
| oai:hal.archives-ouvertes.fr:hal-00461450 | |
| Contributeur : Publications Lmfa | |
| Soumis le : Lundi 30 Août 2010, 17:10:30 | |
| Dernière modification le : Mercredi 1 Septembre 2010, 11:23:27 | |
