Simulation of the flow past a circular cylinder in the supercritical regime by blending RANS and variational-multiscale LES models

Abstract : A strategy which blends a Variational Multiscale Large Eddy Simulation model (VMS-LES) and a RANS model in a hybrid approach is investigated. A smooth blending function, which is based on the value of a blending pa-rameter, is used for switching from VMS-LES to RANS. Different definitions of the blending parameter are investigated. The capabilities of the novel hy-brid approach are appraised in the simulation of the flow around a circular cylinder at a Reynolds number 1.4 · 10 5 , based on the freestream velocity and on the cylinder diameter, in presence of turbulent boundary-layer due to tur-bulent inflow conditions. A second study at Reynolds numbers from 6.7 · 10
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Submitted on : Tuesday, November 18, 2014 - 9:24:50 AM
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Carine Moussaed, Maria Vittoria, Stephen Wornom, Bruno Koobus, Alain Dervieux. Simulation of the flow past a circular cylinder in the supercritical regime by blending RANS and variational-multiscale LES models. Journal of Fluids and Structures, Elsevier, 2014, 47, pp.114 - 123. ⟨10.1016/j.jfluidstructs.2013.11.006⟩. ⟨hal-01083801⟩

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