REVIEW ARTICLES: Turbulent Free-Surface Interaction

Some Aspects of Near-Surface Vortices

[+] Author and Article Information
M. Gharib

California Institute of Technology, Pasadena CA 91125

Appl. Mech. Rev 47(6S), S157-S162 (Jun 01, 1994) doi:10.1115/1.3124396 History: Online April 29, 2009


An experimental investigation of the dynamics of near surface vortices is presented. Using digital particle image velocimetry, the velocity and vorticity fields of a vortex ring and a pair of undulated vortices were mapped as they rise toward a free surface. Circulation measurements indicate that vortex disconnection and appearance of the surface-normal vortices are simultaneous. Vortex disconnection due to the vorticity flux through the surface is shown to be related to the free-surface deceleration.

Copyright © 1994 by American Society of Mechanical Engineers
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