Sensitizing the Dissipation Equation to Irrotational Strains

[+] Author and Article Information
K. Hanjalić, B. E. Launder

Department of Mechanical Engineering, University of California, Davis, Calif. 95616

J. Fluids Eng 102(1), 34-40 (Mar 01, 1980) (7 pages) doi:10.1115/1.3240621 History: Received February 14, 1979; Online October 26, 2009


The paper recommends the addition of an extra term to the conventional approximate transport equation for the turbulence energy dissipation rate. The term may be interpreted as emphasizing the role of irrotational deformations in promoting energy transfer across the spectrum or, equivalently, of augmenting the influence of normal strains. Calculations, including the new term, are reported for the plane and round jet, and for several turbulent boundary layers. In the cases considered the addition of the new term significantly improves agreement with experiment.

Copyright © 1980 by ASME
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