Parallel Simulation of Complex Unsteady Flows with Variational Multiscale LES and Hybrid RANS/LES

Hilde Ouvrard Bruno Koobus (Université de Montpellier) Maria-Vittoria Salvetti Simone Camarri (Scuola Normale Superiore di Pisa, Italy) Steve Wornom (LEMMA S.A., Sophia-Antipolis, France) Alain Dervieux (INRIA, BP93, 06902 Sophia-Antipolis, France)

INRIA Research Report #6917, 2009 (20 pages)

Abstract: We study a new hybrid RANS/Variational Multiscale LES (VMS-LES) model for bluff body flows. The simulations have been carried out using a parallelized solver, based on a mixed finite element/finite volume formulation on unstructured grids. Parallel performances are analysed. The behavior of a VMS-LES model with different subgrid scale models is investigated for the flow past a circular cylinder at Reynolds number Re=3900. Second, a new strategy for blending RANS and LES methods in a hybrid model is described and applied to the simulation of the flow around a circular cylinder at Re=140000

Keywords: Bluff-body flows, variational multiscale, LES, hybrid RANS/LES, parallel simulation

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@techreport{OKSCWD09,
  author = {Ouvrard, H. and Koobus, B. and Salvetti, M.-V. and Camarri, S. and Wornom, S. and Dervieux, A.},
  title = {Parallel Simulation of Complex Unsteady Flows with Variational Multiscale {LES} and Hybrid {RANS}/{LES}},
  institution = {INRIA},
  type = {Research Report},
  number = {6917},
  url = {http://hal.inria.fr/inria-00381570/en/},
  year = 2009
}