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Explicit filtering LES for turbulent non-premixed combustion

Chakravorty, Saugata and Mathew, Joseph (2007) Explicit filtering LES for turbulent non-premixed combustion. In: ASME/JSME 2007 5th Joint Fluids Engineering Conference (FEDSM2007) , 30 Jul- 2 Aug, San Diego.

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Abstract

Two models for large eddy simulation of turbulent reacting flow in homogeneous turbulence were studied. The sub-grid stress arising out of non-linearities of the Navier-Stokes equations were modeled using an explicit filtering approach. A filtered mass density function (FMDF) approach was used for closure of the sub-grid scalar fluctuations. A posteriori calculations, when compared with the results from the direct numerical simulation, indicate that the explicit filtering is adequate in representing the effect of sub-grid stress on the filtered velocity field in the absence of reaction. Discrepancies arise when reactions occur, but the FMDF approach suffices to account for sub-grid scale fluctuations of the reacting scalars, accurately.

Item Type: Conference Paper
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 22 Oct 2011 07:50
Last Modified: 22 Oct 2011 07:50
URI: http://eprints.iisc.ernet.in/id/eprint/41579

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