Interpreting Vortex Interactions With a Free Surface

[+] Author and Article Information
E. P. Rood

Fluid Dynamics Program, Office of Naval Research, Arlington, VA 22217

J. Fluids Eng 116(1), 91-94 (Mar 01, 1994) (4 pages) doi:10.1115/1.2910248 History: Received April 01, 1993; Revised January 07, 1994; Online May 23, 2008


An understanding of the process by which vorticity interacts with a free surface is sought by analytical examination of the free-surface condition for the vorticity flux. A novel mechanism is suggested that permits closed vortex loops to evolve into open loops terminating at the free surface. It is hypothesized that abrupt vortex “disconnection,” observed in physical experiments, arises from a smooth diffusion of vorticity through the interface, with a necessary coincident tangential acceleration of the interface attributed to viscous forces.

Copyright © 1994 by The American Society of Mechanical Engineers
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