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Journal Articles Physical Review Letters Year : 2005

Intermittency of Velocity Time Increments in Turbulence

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Laurent Chevillard
Emmanuel Lévêque
Jean-François Pinton
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  • PersonId : 830908
Alain Arnéodo

Abstract

We analyze the statistics of turbulent velocity fluctuations in the time domain. Three cases are computed numerically and compared: (i) the time traces of Lagrangian fluid particles in a (3D) turbulent flow (referred to as the dynamic case); (ii) the time evolution of tracers advected by a frozen turbulent field (the static case); (iii) the evolution in time of the velocity recorded at a fixed location in an evolving Eulerian velocity field, as it would be measured by a local probe (referred to as the virtual probe case). We observe that the static case and the virtual probe cases share many properties with Eulerian velocity statistics. The dynamic (Lagrangian) case is clearly different; it bears the signature of the global dynamics of the flow.
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Dates and versions

ensl-00180594 , version 1 (19-10-2007)

Identifiers

  • HAL Id : ensl-00180594 , version 1

Cite

Laurent Chevillard, Stéphane G. Roux, Emmanuel Lévêque, Nicolas Mordant, Jean-François Pinton, et al.. Intermittency of Velocity Time Increments in Turbulence. Physical Review Letters, 2005, 95 (1), pp.064501. ⟨ensl-00180594⟩
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