2003•Proceeding of Third Symposium on Turbulence and Shear Flow PhenomenaRequires access

TRANSPORTATION PROPERTIES OF SCALAR TURBULENCE AT DIFFERENT MOLECULAR PRANDTL NUMBERS

Hai-Bing Zhou, Guixiang Cui, Chunxiao Xu, Zhaoshun Zhang, L. Shao

Abstract

The transportation property of scalar turbulence is studied at various molecular Prandtl numbers in both homogeneous and inhomogeneous turbulence. The results show that the Reynolds averaged Prandtl number is a linear reciprocal function of molecular Prandtl number, whereas subgrid Prandtl number takes a minimum around Pr~1 in LES. The variation of turbulent Prandtl number with molecular Prandtl number can be well interpreted by the transportation mechanism at different molecular Prandtl numbers.

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Key concepts: Prandtl number, Turbulent Prandtl number, Turbulence, Magnetic Prandtl number, Scalar (mathematics), Physics, Reynolds number, Classical mechanics