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Impact of dynamic subgrid-scale modeling in variational multiscale large-eddy simulation of bluff-body flows

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Abstract

The effects of dynamic subgrid-scale (SGS) modeling are investigated in variational multiscale (VMS) large-eddy simulation (LES) simulations of bluff-body flows. The spatial discretization is based on a mixed finite-element/finite-volume formulation on unstructured grids. In the VMS approach used in this work, the separation between the largest and the smallest resolved scales is obtained through a variational projection operator and a finite-volume cell agglomeration. The dynamic and non-dynamic versions of Smagorinsky and wall-adapted local eddy-viscosity SGS models are used to account for the effects of the unresolved scales. In the VMS approach, these effects are only modeled in the smallest resolved scales. The VMS-LES and classical LES approaches, combined with the considered dynamic and non-dynamic SGS models, are applied to the simulation of the flow around a circular cylinder at Reynolds numbers 3,900 and 20,000 and to the flow around a square cylinder at Reynolds numbers 22,000 and 175,000.

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Authors and Affiliations

  1. I3M, Université Montpellier 2, Place Eugèe Bataillon, 34095, Montpellier Cedex, France

    Carine Moussaed & Bruno Koobus

  2. LEMMA, 2000 Route des Lucioles, 06902, Sophia-Antipolis, France

    Stephen Wornom

  3. Dipartimento di Ingegneria Civile e Industriale, Università di Pisa, Via G. Caruso 8, 56122, Pisa, Italy

    Maria-Vittoria Salvetti

  4. INRIA, 2004 Route des Lucioles, 06902, Sophia-Antipolis, France

    Alain Dervieux

Authors
  1. Carine Moussaed
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  2. Stephen Wornom
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  3. Maria-Vittoria Salvetti
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  4. Bruno Koobus
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  5. Alain Dervieux
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Correspondence to Carine Moussaed.

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Moussaed, C., Wornom, S., Salvetti, MV. et al. Impact of dynamic subgrid-scale modeling in variational multiscale large-eddy simulation of bluff-body flows. Acta Mech 225, 3309–3323 (2014). https://doi.org/10.1007/s00707-014-1112-6

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  • DOI: https://doi.org/10.1007/s00707-014-1112-6

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