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The pinch-off process in a starting buoyant plume

Pottebaum, T. S. and Gharib, M. (2004) The pinch-off process in a starting buoyant plume. Experiments in Fluids, 37 (1). pp. 87-94. ISSN 0723-4864.

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The vortex ring formation process of a starting buoyant plume was studied experimentally using digital particle image thermometry and velocimetry (DPITV). The vortex ring was observed to pinch-off, or become disconnected, from the trailing plume. Pinch-off occurred at non-dimensional times, or formation numbers, between 4.4 and 4.9. The observed pinch-off process is consistent with an explanation based upon the Kelvin–Benjamin variational principle. This is analogous to the pinch-off of a vortex ring generated using a piston–cylinder apparatus, suggesting that pinch-off is a general component of the vortex ring formation process for various generation mechanisms.

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Additional Information:© 2004 Springer-Verlag. Received: 18 October 2002; Accepted: 25 December 2003. Published online: 25 March 2004.
Issue or Number:1
Record Number:CaltechAUTHORS:20130911-084208788
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:41232
Deposited By: Tony Diaz
Deposited On:11 Sep 2013 22:09
Last Modified:03 Oct 2019 05:47

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