Interaction of an unequal-strength vortex pair

So, J., Ryan, K. and Sheard, G. J. (2007). Interaction of an unequal-strength vortex pair. In: Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, Mee, David, Clements, Rose, Morgan, Richard and Lemckert, Charles, 16th Australasian Fluid Mechanics Conference (AFMC). , Gold Coast, Queensland, Australia, (1457-1462). 3-7 December, 2007.

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Author So, J.
Ryan, K.
Sheard, G. J.
Title of paper Interaction of an unequal-strength vortex pair
Conference location Gold Coast, Queensland, Australia
Conference dates 3-7 December, 2007
Proceedings title 16th Australasian Fluid Mechanics Conference (AFMC)
Place of Publication Brisbane, Australia
Publisher School of Engineering, The University of Queensland
Publication Year 2007
Year available 2007
Sub-type Fully published paper
ISBN 978-1-864998-94-8
Editor Jacobs, Peter
McIntyre, Tim
Cleary, Matthew
Buttsworth, David
Mee, David
Clements, Rose
Morgan, Richard
Lemckert, Charles
Start page 1457
End page 1462
Total pages 6
Collection year 2007
Language eng
Abstract/Summary In this investigation, two-dimensional simulations of unequal strength Lamb–Oseen counter-rotating vortex pairs were conducted using a spectral-element method. Simulations were performed at three different Reynolds numbers, Re = 6660, 13340 and 20000, and various relative strength of vortex circulation ratios were considered. The strain adaptation and the viscous relaxation were shown to be dependent on the relative strength of the vortices, but independent of Reynolds number. The vortex pairs converged to a unique solution on the viscous time-scale for each relative strength value. The completion of the adaptation and the relaxation are determined based on the variation of the vortex eccentricity which is a ratio of the strain rate to the vorticity at each vortex center. The viscosity begins to affect the vortex dynamics once those two processes are completed. The two-dimensional simulation results also provide the initial base flows of vortex pairs which will be used in future threedimensional stability analysis studies.
Subjects 291500 Biomedical Engineering
290200 Aerospace Engineering
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Conference Paper
Collection: 16th Australasian Fluid Mechanics Conference
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Created: Thu, 20 Dec 2007, 09:08:28 EST by Laura McTaggart on behalf of School of Engineering