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TECHNICAL BRIEFS

Local Anisotropy in Strained Turbulence at High Reynolds Numbers

[+] Author and Article Information
P. A. Durbin

Center for Turbulence Research, Stanford University, Stanford, CA 94035-3030

C. G. Speziale

Institute for Computer Applications in Science and Engineering, NASA Langley Research Center, Hampton, VA 23665-5225

J. Fluids Eng 113(4), 707-709 (Dec 01, 1991) (3 pages) doi:10.1115/1.2926540 History: Received February 08, 1991; Online May 23, 2008

Abstract

It is shown that the hypothesis of local isotropy is implausible in the presence of significant mean rates of strain. In fact, it appears that in uniform shear flow near equilibrium, local isotropy can never constitute a systematic approximation, even in the limit of infinite Reynolds number. An estimate of the level of mean strain rate for which local isotropy is formally a good approximation is provided.

Copyright © 1991 by The American Society of Mechanical Engineers
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