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Linear-eddy modelling of turbulent transport. Part 3. Mixing and differential molecular diffusion in round jets

Published online by Cambridge University Press:  26 April 2006

Alan R. Kerstein
Alan R. Kerstein
Affiliation:
Combustion Research Facility, Sandia National Laboratories, Livermore, CA 94551-0969, USA
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Abstract

The linear-eddy model of turbulent mixing represents a spatially developing flow by simulating the time development along a comoving transverse line. Along this line, scalar quantities evolve by molecular diffusion and by randomly occurring spatial rearrangements, representing turbulent convection. The modelling approach, previously applied to homogeneous turbulence and to planar shear layers, is generalized to axisymmetric flows. This formulation captures many features of jet mixing, including differential molecular diffusion effects. A novel experiment involving two unmixed species in the nozzle fluid is proposed and analysed.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 216 , July 1990 , pp. 411 - 435
Copyright
© 1990 Cambridge University Press

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