An extended Kays and Crawford turbulent Prandtl number model

For theoretical predictions of turbulent heat transfer in boundary layers and in duct flows, the knowledge of the turbulent Prandtl number is crucial. This is especially true for fluids with low molecular Prandtl numbers (liquid metals). The present formulation, which is an extended Kays and Crawfor...

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Bibliographic Details
Published in:International journal of heat and mass transfer 1997, Vol.40 (17), p.4191-4196
Main Authors: Weigand, B., Ferguson, J.R., Crawford, M.E.
Format: Article
Language:English
Subjects:
Boundary layer and shear turbulence
Convection and heat transfer
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Physics
Turbulent flows, convection, and heat transfer
Wall-bounded thin shear flows
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Summary:For theoretical predictions of turbulent heat transfer in boundary layers and in duct flows, the knowledge of the turbulent Prandtl number is crucial. This is especially true for fluids with low molecular Prandtl numbers (liquid metals). The present formulation, which is an extended Kays and Crawford ( Convective Heat and Mass Transfer, 3rd edn. McGraw-Hill, New York, 1993) turbulent Prandtl number model, can be used for accurately predicting the heat transfer for liquid metal flows. The Nusselt numbers calculated with the modified model for Pr t are found to be in good agreement with experimental data for fully-developed pipe flows as well as for thermally developing pipe flows for various wall boundary conditions. The present model reduces to the one given in the above reference for liquids and gases with higher molecular Prandtl numbers.
ISSN:0017-9310
1879-2189
DOI:10.1016/S0017-9310(97)00084-7