Coastal Bottom Boundary Layers

[+] Author and Article Information
J. F. A. Sleath

Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, United Kingdom

Appl. Mech. Rev 48(9), 589-600 (Sep 01, 1995) (12 pages) doi:10.1115/1.3023147 History: Online April 29, 2009


Turbulent boundary layers in oscillatory flow are reviewed. These boundary layers show a thin inner layer with similar characteristics to wall layers in steady flow. Above this, there is an outer layer which has some characteristics which are the same as those of steady flow outer layers and other characteristics which are different. One difference is that the defect velocity profile does not scale on the shear velocity alone. Also, over rough beds, the turbulence intensity in the outer layer falls off with height in a similar way to oscillating grid turbulence. Transition from laminar to turbulent flow is also reviewed. Combined oscillatory and steady flows are only briefly touched on.

Copyright © 1995 by The American Society of Mechanical Engineers
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