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Instability of strained vortex layers and vortex tube formation in homogeneous turbulence

Published online by Cambridge University Press:  26 April 2006

T. Passot ,
H. Politano ,
P.L. Sulem ,
J.R. Angilella  and
M. Meneguzzi
T. Passot
Affiliation:
CNRS URA 1362, Observatoire de la Côte d'Azur, BP 229, 06304 Nice Cedex 4, France
H. Politano
Affiliation:
CNRS URA 1362, Observatoire de la Côte d'Azur, BP 229, 06304 Nice Cedex 4, France
P.L. Sulem
Affiliation:
CNRS URA 1362, Observatoire de la Côte d'Azur, BP 229, 06304 Nice Cedex 4, France
J.R. Angilella
Affiliation:
CERFACS, 42 Avenue G. Coriolis, 31057 Toulouse, France
M. Meneguzzi
Affiliation:
CERCA, 5160 Boulevard Décarie, Montreal, Quebec H2X 2H9, Canada
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Abstract

A modulational perturbation analysis is presented which shows that when a strained vortex layer becomes unstable, vorticity concentrates into steady tubular structures with finite amplitude, in quantitative agreement with the numerical simulations of Lin & Corcos (1984). Elaborated three-dimensional visualizations suggest that this process, due to a combination of compression and self-induced rotation of the layer, is at the origin of intense and long-lived vortex tubes observed in direct numerical simulations of homogeneous turbulence.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 282 , 10 January 1995 , pp. 313 - 338
Copyright
© 1995 Cambridge University Press

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