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Hybrid RANS-LES Modelling With the Renormalization Group

[+] Author Affiliations
Chris De Langhe, Bart Merci, Erik Dick

Ghent University, Gent, Belgium

Paper No. FEDSM2002-31280, pp. 647-651; 5 pages
doi:10.1115/FEDSM2002-31280
From:
  • ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
  • Volume 1: Fora, Parts A and B
  • Montreal, Quebec, Canada, July 14–18, 2002
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3615-0 | eISBN: 0-7918-3600-2
  • Copyright © 2002 by ASME

abstract

A two-equation turbulence model that can adjust itself from RANS to LES regimes is constructed using the renormalization group. When the grid-spacing gets to coarse for LES, the model tends to a RANS model. In well-resolved regions the model results in a LES subgrid-model. The renormalization group procedure leads to transport-equations that are dependent on the filterwidth and contain no adjustable constants.

Copyright © 2002 by ASME

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