A Note on the Empirical Constant in the Kolmogorov-Prandtl Eddy-Viscosity Expression

[+] Author and Article Information
W. Rodi

Sonderforschungsbereich 80, University of Karlsruhe, W. Germany

J. Fluids Eng 97(3), 386-389 (Sep 01, 1975) (4 pages) doi:10.1115/1.3447325 History: Received June 03, 1975; Online October 12, 2010


The transport equation for the Reynolds stress is simplified to yield the Kolmogorov-Prandtl eddy viscosity expression, and the conditions are studied under which the empirical factor cμ in this expression can be a constant. By reference to experimental data, it is shown that these conditions are not generally satisfied. The measured variation of cμ is given for various thin shear layers. Those flows are identified, which can be calculated with a constant value of cμ .

Copyright © 1975 by ASME
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