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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[Research Report] RR-3056, INRIA. 1996
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https://hal.inria.fr/inria-00073636
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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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