Wind-Generated Surface Waves on a Viscous Fluid

[+] Author and Article Information
C. Katsis, T. R. Akylas

Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Mass. 02139

J. Appl. Mech 52(1), 208-212 (Mar 01, 1985) (5 pages) doi:10.1115/1.3168999 History: Received February 01, 1984; Revised June 01, 1984; Online July 21, 2009


The excitation of surface waves on a viscous fluid by shear flows is studied. Turbulent and laminar air flows over oil of low and high viscosity are considered. It is found that the dominant wave-generation mechanism depends crucially on the shear-flow profile: for a turbulent flow, long surface waves are generated at low wind speeds due to the work done by the stress components in phase with the surface slope, while Kelvin-Helmholtz instability is responsible for the excitation of short waves at higher wind speeds. On the other hand, for a laminar shear flow, direct resonance between surface waves and Tollmien-Schlichting waves in the shear flow is the dominant wave-generation mechanism.

Copyright © 1985 by ASME
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