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THMT-12. Proceedings of the Seventh International Symposium On Turbulence Heat and Mass Transfer
September, 24-27, 2012, Palermo, Italy

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal


ISBN Print: 978-1-56700-302-4

ISSN: 2377-2816

Investigation of the equivalence of two hybrid temporal-LES methods based on elliptic blending in separated flows

pages 934-945
DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.990
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RESUMO

A criterion was established by Manceau et al. [1] enabling to analytically assess, for some simplified, closeto- equilibrium situations, the equivalence of hybrid RANS/LES methods. In the present paper, this criterion is tested upon the flow over a periodic hill at a bulk Reynolds number of 10595, which involves massive separation, thus strongly departing from equilibrium conditions. Computations are performed using two hybrid methods, TPITM and DES, based on the same subfilter closure model, the modified elliptic blending Reynolds-stress model. Results show (i) a satisfactory comparison with the reference LES results of Breuer et al. [2] and (ii) a strong agreement between T-PITM and DES, thus extending the range of validity of the equivalence criterion established by Manceau et al. [1].

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