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Dynamic Subgrid Pdf Modeling for Nonpremixed Turbulent Combustion

  • J. Réveillon
  • L. Vervisch
Conference paper
Part of the ERCOFTAC Series book series (ERCO, volume 5)

Abstract

Large Damköhler number nonpremixed combustion is considered and subgrid fluctuations of mixture fraction are accounted for through a subgrid probability density function (SGPDF). First, the response of the LES dynamic model to heat release induced effects is studied by using a presumed form for the SGPDF. Then, a dynamic closure for diffusive processes is proposed. It provides a subgrid mixing time scale and a solution for the SGPDF transport equation. To estimate the validity of these closures, LES and DNS have been performed in 3D homogeneous and freely decaying turbulence.

Keywords

Large Eddy Simulation Mixture Fraction Turbulent Combustion Fuel Mass Fraction Nonpremixed Turbulent Flame 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media Dordrecht 1997

Authors and Affiliations

  • J. Réveillon
    • 1
  • L. Vervisch
    • 1
  1. 1.LMFN-INSA de Rouen URACNRS 230 — CORIAAignan CédexFrance

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