A new effect, in gases, are discussed.
The phenomenon of turbulent barodiffusion is related to the dynamics of a gaseous admixture advected by
compressible turbulent fluid flow with low Mach numbers. Turbulent barodiffusion causes an additional
mass flux of the gaseous admixture directed to the maximum of the mean fluid pressure. At large Peclet
and Reynolds numbers this additional flux is considerably higher than that caused by molecular
barodiffusion. Turbulent barodiffusion may contribute to the formation of large-scale inhomogeneous
structures in spatial distribution of gaseous admixtures advected by a low-Mach-number compressible turbulent velocity field.
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Department of Mechanical Engineering
- T. Elperin, N. Kleeorin, and I. Rogachevskii, Turbulent Barodiffusion, Turbulent
Thermal Diffusion, and Large-scale Instability in Gases. Physical Review
E, 55/3, 2713-2721, 1997.
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