vortex ring
(redirected from Hill's vortex)Also found in: Dictionary.
Related to Hill's vortex: Vortex ring
vortex ring
[′vȯr‚teks ‚riŋ] (fluid mechanics)
A line vortex in which the line of concentrated vorticity is a closed curve. Also known as collar vortex; ring vortex.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.