Étude numérique des jets turbulents non-isothermes avec deux schémas de fermeture κ-ε

Translated title of the contribution: Numerical study of non-isothermal turbulent jets by two κ-ε closure models

M. H. Gazzah, M. Sassi

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Abstract

This article presents a numerical study of a non-isothermal axisymmetric turbulent jet by two κ-ε closure models based on Favre or Reynolds averaging, respectively. The numerical results are in good agreement with the experimental ones found in the literature. We show, in particular, the advantage of treating separately the turbulent mass flux terms and their contribution to predicting variable density effects. A mixing efficiency definition is finally introduced. It is observed that the mixing efficiency increases when the density ratio between the turbulent jet and the ambient gas is reduced.

Translated title of the contributionNumerical study of non-isothermal turbulent jets by two κ-ε closure models
Original languageFrench
Pages (from-to)417-423
Number of pages7
JournalComptes Rendus de l'Academie de Sciences - Serie IIb: Mecanique
Volume329
Issue number6
DOIs
StatePublished - 2001

Keywords

  • Computational fluid mechanics
  • Density effect
  • Jet
  • Non-isothermal
  • Turbulence
  • Turbulent mass flux
  • κ-εmodel

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