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Interaction of localised packets of vorticity with turbulence

Leonard, A. (2005) Interaction of localised packets of vorticity with turbulence. In: Tubes, Sheets and Singularities in Fluid Dynamics. Fluid Mechanics and Its Applications. No.71. Kluwer Academic Publishers , Dordrecht, pp. 201-210. ISBN 978-1-4020-0980-8.

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The evolution of initially weak structures of vorticity as they evolve in an incompressible turbulent flow is investigated. Such objects are candidates for important structures in the inertial range and in the dissipation range of scales. As these structures are strained by the flow, fine-scales of vorticity are produced along the direction of maximum compression with a consequent flow of energy to the high wavenumbers. It is shown that, under certain circumstances, the self-energy spectrum of such a structure may be time-averaged, producing a fractional power law. The exponent of the power law depends on the ratio of the first two Lyapunov exponents of the strain tensor.

Item Type:Book Section
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Additional Information:© 2002 Kluwer Academic Publishers.
Subject Keywords:Lyapunov Exponent; Vortex Ring; Vortex Tube; Inertial Range; Chaotic Advection
Series Name:Fluid Mechanics and Its Applications
Issue or Number:71
Record Number:CaltechAUTHORS:20200304-094728369
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:101703
Deposited By: Tony Diaz
Deposited On:04 Mar 2020 18:18
Last Modified:04 Mar 2020 18:18

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