Search Results - "Champion, Michel"

On the evolution of the scalar flux through a planar premixed turbulent flame brush by Mura, Arnaud, Robin, Vincent, Kha, Kim Q.N., Champion, Michel

“…The thermal expansion induced by the exothermicity of chemical reactions taking place in a turbulent flame affects the flow dynamics so deeply that the…”
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Scalar dissipation and mean reaction rates in premixed turbulent combustion by Bray, Ken, Champion, Michel, Libby, Paul A., Swaminathan, N.

“…A general equation for a variance parameter, appearing as a crucial quantity in a simple algebraic expression for the mean chemical rate, is derived. This…”
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Algebraic Models for Turbulent Transports in Premixed Flames by Robin, Vincent, Mura, Arnaud, Champion, Michel

“…The thermal expansion induced by the chemical reactions taking place in a turbulent reactive flow of premixed reactants affects the velocity field so strongly…”
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Relevance of the Bray number in the small-scale modeling of turbulent premixed flames by Mura, Arnaud, Champion, Michel

“…The present study is devoted to the analysis of the influence of expansion phenomena on turbulent small scales in premixed reactive flows. It is shown that,…”
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Modeling of scalar dissipation in partially premixed turbulent flames by Mura, Arnaud, Robin, Vincent, Champion, Michel

“…The question of the closure of scalar dissipation terms for both passive and reactive scalars is addressed. In a first step of the analysis, modeled transport…”
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Brief Communication: Relevance of the Bray number in the small-scale modeling of turbulent premixed flames by Mura, Arnaud, Champion, Michel

“…The present study is devoted to the analysis of the influence of expansion phenomena on turbulent small scales in premixed reactive flows. It is shown that,…”
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Experimental and numerical analysis of stratified turbulent V-shaped flames by Robin, Vincent, Mura, Arnaud, Champion, Michel, Degardin, Olivier, Renou, Bruno, Boukhalfa, Mourad

“…The present paper is devoted to (i) the experimental study of partially premixed combustion with strong equivalence ratio gradients, i.e., stratification of…”
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Analysis of Algebraic Closures of the Mean Scalar Dissipation Rate of the Progress Variable Applied to Stagnating Turbulent Flames by Dong, Huy Quang, Robin, Vincent, Mura, Arnaud, Champion, Michel

“…In the turbulent premixed reactive flows considered in this study, i.e. large Damköhler and Reynolds numbers, the flamelet regime of turbulent combustion…”
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Density Variations Effects in Turbulent Diffusion Flames: Modeling Of Unresolved Fluxes by Serra, Sylvain, Robin, Vincent, Mura, Arnaud, Champion, Michel

“…Unresolved fluxes in turbulent diffusion flames are investigated by introducing the specific volume to analyze the effects of density variations. Unresolved…”
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Modeling the Effects of Thermal Expansion on Scalar Turbulent Fluxes in Turbulent Premixed Flames by Robin, Vincent, Mura, Arnaud, Champion, Michel, Hasegawa, Tatsuya

“…The thermal expansion induced by the chemical reactions taking place in a turbulent reactive flow affects the velocity field so strongly that velocity…”
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Relevance of Two Basic Turbulent Premixed Combustion Models for the Numerical Simulations of V-Shaped Flames by Kha, Kim Q. N., Losier, Cécile, Robin, Vincent, Mura, Arnaud, Champion, Michel

“…The present study is devoted to the analysis of basic turbulent premixed combustion closures applied to the numerical simulations of V-shaped flames. It is…”
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ALGEBRAIC MODELS FOR TURBULENT TRANSPORTS IN PREMIXED FLAMES : THE 23RD INTERNATIONAL COLLOQUIUM ON THE DYNAMICS OF EXPLOSIONS AND REACTIVE SYSTEMS by ROBIN, Vincent, MURA, Arnaud, CHAMPION, Michel

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Theoretical Study of the Turbulent Combustion of Nitramine Propellant by Bray, Kenneth N. C., Champion, Michel, Libby, Paul A.

“…Our analysis of the burning of nitramine propellant in a turbulent shear flow involves several preparatory considerations, their development, and subsequent…”
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Small Scale Features of Velocity and Scalar Fields in Turbulent Premixed Flames by Mura, Arnaud, Robin, Vincent, Champion, Michel, Hasegawa, Tatsuya

“…Because the ultimate stages of turbulent mixing take place at the unresolved scales in either Reynolds Average Navier Stokes (RANS) or Large Eddy Simulation…”
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A Layered Description of a Premixed Flame Stabilized in Stagnating Turbulence by Mura, Arnaud, Robin, Vincent, Kha, Kim Q. N., Champion, Michel

“…In the thin-flame regime of turbulent premixed combustion, instantaneous progress variable gradients are essentially fixed by propagating flamelets. The…”
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A MULTI-DIRAC PRESUMED PDF MODEL FOR TURBULENT REACTIVE FLOWS WITH VARIABLE EQUIVALENCE RATIO by ROBIN, VINCENT, MURA, ARNAUD, CHAMPION, MICHEL, PLION, PIERRE

“…The present paper is devoted to the numerical modeling of turbulent reactive flows in situations where reactants are not ideally premixed. In this case, the…”
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Premixed flames in stagnating turbulence by Bray, Ken, Champion, Michel, Libby, Paul A.

“…A RANS analysis of a jet of premixed reactants impinging on a wall is presented. Unlike previous related studies by the same authors, in which the mean density…”
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A Second-Order Model for Turbulent Reactive Flows with Variable Equivalence Ratio by Robin, Vincent, Champion, Michel, Mura, Arnaud

“…A new theory for Reynolds stresses and turbulent scalar flux of both passive and reactive scalar is developed to describe turbulent reactive flows with…”
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Analysis of Algebraic Closures of the Mean Scalar Dissipation Rate of the Progress Variable Applied to Stagnating Turbulent Flames: Recent Advances in Modelling Turbulent Flames by HUY QUANG DONG, ROBIN, Vincent, MURA, Arnaud, CHAMPION, Michel

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Systematically reduced rate mechanisms and presumed PDF models for premixed turbulent combustion by Bray, Ken, Champion, Michel, Libby, Paul A.

“…The use of reduced kinetic mechanisms in models for turbulent premixed flames, at large but finite Damköhler numbers, is described. Taking as examples the two…”
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