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Variable-viscosity mixing in the very near field of a round jet

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We carry out a comparison between Constant Viscosity Flows (CVF) and Variable Viscosity Flows (VVF), in a round jet, on the basis of the same initial jet momentum. It is found that viscosity variations have a non-negligible impact on mixing. VVF exhibit an acceleration of the trend towards isotropy and self-similarity. Some fundamental turbulence parameters, such as the true Reynolds number (Re), as well as the mean dissipation rate () are expressed and discussed in the context of VVF.

Author(s):

Léa Voivenel    
CORIA UMR 6614
France

Benoît Talbot    

Luminita Danaila    
CORIA UMR 6614
France