# A Critical Evaluation of the Classical $k-\varepsilon$ Model and Wall-Laws for Unsteady Flows over Bluff Bodies

Abstract : The classical $k-\varepsilon$ model and a new implementation of wall-laws have been evaluated for unsteady turbulent flows past square and circular cylinders. We show that good numerics can lead to a serious improvement of the results. In the case of the flow past a square cylinder (Lyn's test case), results agree surprisingly well with the experimental data. In the analysis of the vortex shedding flow past a circular cylinder also the agreement is quite good for the sub-critical regime but not entirely satisfactory after the critical Reynolds number (i.e. the drag crisis phenomenon
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Type de document :
Rapport
[Research Report] RR-3056, INRIA. 1996
Domaine :

https://hal.inria.fr/inria-00073636
Contributeur : Rapport de Recherche Inria <>
Soumis le : mercredi 24 mai 2006 - 13:23:30
Dernière modification le : vendredi 25 mai 2018 - 12:02:05
Document(s) archivé(s) le : dimanche 4 avril 2010 - 23:52:47

### Identifiants

• HAL Id : inria-00073636, version 1

### Citation

Bijan Mohammadi, Gorazd Medic. A Critical Evaluation of the Classical $k-\varepsilon$ Model and Wall-Laws for Unsteady Flows over Bluff Bodies. [Research Report] RR-3056, INRIA. 1996. 〈inria-00073636〉

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