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Effect of time-dependent piston velocity program on vortex ring formation in a piston/cylinder arrangement

Shusser, Michael and Rosenfeld, Moshe and Dabiri, John O. and Gharib, Morteza (2006) Effect of time-dependent piston velocity program on vortex ring formation in a piston/cylinder arrangement. Physics of Fluids, 18 (3). Art. No. 033601. ISSN 1070-6631. http://resolver.caltech.edu/CaltechAUTHORS:SHUpof06

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Abstract

An analytical model describing laminar vortex ring formation in a nozzle flow generator (piston/cylinder arrangement) proposed previously by the authors is extended to time-dependent velocity programs. The predictions of the model are in good agreement with the available numerical data for impulsive, linear, and trapezoidal velocity programs. We also show that properly scaled vortex circulation is another universal quantity, in addition to the dimensionless energy, related to vortex rings and verify this by comparing with available numerical simulations and experimental results.


Item Type:Article
ORCID:
AuthorORCID
Dabiri, John O.0000-0002-6722-9008
Gharib, Morteza0000-0002-2204-9302
Additional Information:© 2006 American Institute of Physics. Received 4 December 2005; accepted 22 February 2006; published online 31 March 2006.
Group:GALCIT
Subject Keywords:vortices; pistons; laminar flow; nozzles
Issue or Number:3
Record Number:CaltechAUTHORS:SHUpof06
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:SHUpof06
Alternative URL:http://dx.doi.org/10.1063/1.2188918
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:7147
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:10 Jan 2007
Last Modified:23 Apr 2019 21:32

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