The decay of anisotropic turbulence (Articolo in rivista)

Type
Label
  • The decay of anisotropic turbulence (Articolo in rivista) (literal)
Anno
  • 2003-01-01T00:00:00+01:00 (literal)
Alternative label
  • L. Biferale, G. Boffetta, A. Celani, A. Lanotte, F. Toschi, and M. Vergassola (2003)
    The decay of anisotropic turbulence
    in Physics of fluids (1994)
    (literal)
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  • L. Biferale, G. Boffetta, A. Celani, A. Lanotte, F. Toschi, and M. Vergassola (literal)
Pagina inizio
  • 2105 (literal)
Pagina fine
  • 2112 (literal)
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  • Contributo di rilevanza internazionale. (literal)
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  • 15 (literal)
Rivista
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  • pubblicazione scientifica (literal)
Note
  • ISI Web of Science (WOS) (literal)
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  • Biferale Univ. Tor Vergata, Roma Boffetta Univ. Torino Celani INLN-CNRS, Francia Lanotte CNR-ISAC Toschi CNR-IAC Vergassola CNRS, Francia (literal)
Titolo
  • The decay of anisotropic turbulence (literal)
Abstract
  • We present the results of a numerical investigation of three-dimensional decaying turbulence with statistically homogeneous and anisotropic initial conditions. We show that at large times, in the inertial range of scales: (i) isotropic velocity fluctuations decay self-similarly at an algebraic rate which can be obtained by dimensional arguments; (ii) the ratio of anisotropic to isotropic fluctuations of a given intensity falls off in time as a power law, with an exponent approximately independent of the strength of the fluctuation; (iii) the decay of anisotropic fluctuations is not self-similar, their statistics becoming more and more intermittent as time elapses. We also investigate the early stages of the decay. The different short-time behavior observed in two experiments differing by the phase organization of their initial conditions gives a new hunch on the degree of universality of small-scale turbulence statistics, i.e. its independence of the conditions at large scales. (literal)
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