Effects of the Local Flow Topologies Upon the Structure of a Premixed Methane-air Turbulent Jet Flame

Abstract : Local flow topologies have been identified and their interactions with the iso-scalar surfaces geometries have been investigated using the results of a three-dimensional direct numerical simulation (DNS) of a turbulent premixed methane-air flame in a piloted Bunsen burner configuration with tabulated chemistry. The universal teardrop shape of the joint probability density function (jpdf) of the second and third invariants of the velocity-gradient tensor disappears in the different flame regions under study. A 'canonical' vortex, which affects the fine-scale structure of the turbulent premixed flame, has been identified and analyzed at three times, differing by increments of the order of the Kolmogorov time micro-scale.
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Article dans une revue
Flow, Turbulence and Combustion, Springer Verlag (Germany), 2016, 96 (2), pp.535-546. 〈10.1007/s10494-015-9686-1〉
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https://hal.archives-ouvertes.fr/hal-01611195
Contributeur : Alexandre Poux <>
Soumis le : jeudi 5 octobre 2017 - 15:35:33
Dernière modification le : mardi 5 juin 2018 - 10:14:20

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Luis Cifuentes, Cesar Dopazo, Jesus Martin, Pascale Domingo, Luc Vervisch. Effects of the Local Flow Topologies Upon the Structure of a Premixed Methane-air Turbulent Jet Flame. Flow, Turbulence and Combustion, Springer Verlag (Germany), 2016, 96 (2), pp.535-546. 〈10.1007/s10494-015-9686-1〉. 〈hal-01611195〉

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