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.
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© 1997 Springer Science+Business Media Dordrecht
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Réveillon, J., Vervisch, L. (1997). Dynamic Subgrid Pdf Modeling for Nonpremixed Turbulent Combustion. In: Chollet, JP., Voke, P.R., Kleiser, L. (eds) Direct and Large-Eddy Simulation II. ERCOFTAC Series, vol 5. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5624-0_29
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DOI: https://doi.org/10.1007/978-94-011-5624-0_29
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