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Turbulent flows and intermittency in laboratory experiments

Identifieur interne : 00B884 ( Main/Exploration ); précédent : 00B883; suivant : 00B885

Turbulent flows and intermittency in laboratory experiments

Auteurs : F. Anselmet [France] ; R. A. Antonia [Australie] ; L. Danaila [France]

Source :

RBID : ISTEX:78F9FBAEF33D80613B95CAAF8CC22851B378708A

Descripteurs français

English descriptors

Abstract

Abstract: In turbulent flows, the transfer of energy from large to small scales is strongly intermittent, in contradiction with Kolmogorov's (Dokl. Akad. Nauk. SSSR 30 (1941) 299; hereafter K41) assumptions. The statistical properties associated with these energy transfer fluctuations at a given scale r have been widely studied theoretically, experimentally and numerically over the last 30 years or so. Such fluctuations are also encountered in various Planetary and Space Science domains. The present paper presents a review of laboratory experiments which clearly display the fractal nature of the (spatial or temporal) energy distribution at scale r, the departures from the K41 predictions being generally quantified through high-order moments of velocity increments.

Url:
DOI: 10.1016/S0032-0633(01)00059-9


Affiliations:


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Le document en format XML

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<term>Cascade models</term>
<term>Circular jets</term>
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<term>Elementary steps</term>
<term>Elsevier science</term>
<term>Energy cascade</term>
<term>Energy dissipation</term>
<term>Energy distribution</term>
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<term>Erent scales</term>
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<term>Gaussian distribution</term>
<term>Generalized equation</term>
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<term>Grid turbulence</term>
<term>High reynolds number turbulence</term>
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<term>Intermittency parameter</term>
<term>Interstellar clouds</term>
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<term>Isotropic turbulence</term>
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<term>Lett</term>
<term>Little whirls</term>
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<term>Local structure</term>
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<term>Meneveau</term>
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<term>Novikov</term>
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<term>Numerical value</term>
<term>Particular eddy</term>
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<term>Present paper</term>
<term>Random distribution</term>
<term>Range exponents</term>
<term>Reasonable agreement</term>
<term>Reynolds</term>
<term>Reynolds number</term>
<term>Reynolds number dependence</term>
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<term>Small scales</term>
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<term>Space science</term>
<term>Spiral vortices</term>
<term>Sreenivasan</term>
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<term>Structure functions</term>
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<div type="abstract" xml:lang="en">Abstract: In turbulent flows, the transfer of energy from large to small scales is strongly intermittent, in contradiction with Kolmogorov's (Dokl. Akad. Nauk. SSSR 30 (1941) 299; hereafter K41) assumptions. The statistical properties associated with these energy transfer fluctuations at a given scale r have been widely studied theoretically, experimentally and numerically over the last 30 years or so. Such fluctuations are also encountered in various Planetary and Space Science domains. The present paper presents a review of laboratory experiments which clearly display the fractal nature of the (spatial or temporal) energy distribution at scale r, the departures from the K41 predictions being generally quantified through high-order moments of velocity increments.</div>
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