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A priori analysis of subgrid-scale models for large eddy simulations of supercritical binary-species mixing layers

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dc.contributor.author Okong'o, Nora
dc.contributor.author Bellan, Josette
dc.date.accessioned 2007-11-01T01:09:23Z
dc.date.available 2007-11-01T01:09:23Z
dc.date.issued 2005-01-10
dc.identifier.citation American Institure of Aeronautics and Astronautics Sciences Meeting, Reno, Nevada, January 10-15, 2005. en
dc.identifier.clearanceno 04-3495
dc.identifier.uri http://hdl.handle.net/2014/40504
dc.description.abstract Models for large eddy simulation (LES) are assessed on a database obtained from direct numerical simulations (DNS) of supercritical binary-species temporal mixing layers. The analysis is performed at the DNS transitional states for heptane/nitrogen, oxygen/hydrogen and oxygen/helium mixing layers. The incorporation of simplifying assumptions that are validated on the DNS database leads to a set of LES equations that requires only models for the subgrid scale (SGS) fluxes, which arise from filtering the convective terms in the DNS equations. Constant-coefficient versions of three different models for the SGS fluxes are assessed and calibrated. The Smagorinsky SGS-flux model shows poor correlations with the SGS fluxes, while the Gradient and Similarity models have high correlations, as well as good quantitative agreement with the SGS fluxes when the calibrated coefficients are used. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 0 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2005. en
dc.subject high pressure en
dc.subject turbulence en
dc.title A priori analysis of subgrid-scale models for large eddy simulations of supercritical binary-species mixing layers en
dc.type Preprint en


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