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Article Dans Une Revue The European Physical Journal B: Condensed Matter and Complex Systems Année : 2005

On the Rapid Increase of Intermittency in the Near-Dissipation Range of Fully Developed Turbulence

Résumé

Intermittency, measured as log(F(r)/3), where F(r) is the flatness of velocity increments at scale r, is found to rapidly increase as viscous effects intensify, and eventually saturate at very small scales. This feature defines a finite intermediate range of scales between the inertial and dissipation ranges, that we shall call near-dissipation range. It is argued that intermittency is multiplied by a universal factor, independent of the Reynolds number Re, throughout the near-dissipation range. The (logarithmic) extension of the near-dissipation range varies as \sqrt(log Re). As a consequence, scaling properties of velocity increments in the near-dissipation range strongly depend on the Reynolds number.

Dates et versions

hal-00148450 , version 1 (22-05-2007)

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Laurent Chevillard, Bernard Castaing, Emmanuel Lévêque. On the Rapid Increase of Intermittency in the Near-Dissipation Range of Fully Developed Turbulence. The European Physical Journal B: Condensed Matter and Complex Systems, 2005, 45, pp.561-567. ⟨hal-00148450⟩
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