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RESEARCH PAPERS

Low-Reynolds-Number Turbulent Boundary Layers

[+] Author and Article Information
B. R. White

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

J. Fluids Eng 103(4), 624-630 (Dec 01, 1981) (7 pages) doi:10.1115/1.3241782 History: Received August 04, 1979; Online October 26, 2009

Abstract

This paper presents experimental wind-tunnel data that show the universal logarithmic velocity profile for zero-pressure-gradient turbulent boundary layer flows is valid for values of momentum-deficit Reynolds numbers Rθ as low as 600. However, for values of Rθ between 425 and 600, the von Kármán and additive constants vary and are shown to be functions of Rθ and shape factor H. Furthermore, the viscous sublayer in the range 425<Rθ <600 can no longer maintain its characteristically small size. It is forced to grow, due to viscous effects, into a super sublayer (6-9 percent of the boundary layer height) that greatly exceeds conventional predictions of sublayer heights.

Copyright © 1981 by ASME
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