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Reconnection of Colliding Vortex Rings

Chatelain, Philippe and Kivotides, Demosthenes and Leonard, Anthony (2003) Reconnection of Colliding Vortex Rings. Physical Review Letters, 90 (5). Art. No. 054501. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:CHAprl03

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Abstract

We investigate numerically the Navier-Stokes dynamics of reconnecting vortex rings at small Reynolds number for a variety of configurations. We find that reconnections are dissipative due to the smoothing of vorticity gradients at reconnection kinks and to the formation of secondary structures of stretched antiparallel vorticity which transfer kinetic energy to small scales where it is subsequently dissipated efficiently. In addition, the relaxation of the reconnection kinks excites Kelvin waves which due to strong damping are of low wave number and affect directly only large scale properties of the flow.


Item Type:Article
Additional Information:©2003 The American Physical Society (Received 3 September 2002; revised 16 December 2002; published 6 February 2003) This research was partially supported by the Office of Naval Research and the Department of Energy.
Subject Keywords:Navier-Stokes equations; vortices; flow simulation
Record Number:CaltechAUTHORS:CHAprl03
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:CHAprl03
Alternative URL:http://dx.doi.org/10.1103/PhysRevLett.90.054501
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2772
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:26 Apr 2006
Last Modified:26 Dec 2012 08:50

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