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Energy and enstrophy fluxes in the double cascade of two-dimensional turbulence

Published online by Cambridge University Press:  08 October 2007

G. BOFFETTA
G. BOFFETTA*
Affiliation:
Dipartimento di Fisica Generale and INFN, Università degli Studi di Torino, Via Pietro Giuria 1, 10125, Torino, Italy and CNR-ISAC, Sezione di Torino, Corso Fiume 4, 10133 Torino, Italy
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Abstract

High-resolution direct numerical simulations of two-dimensional turbulence in stationary conditions are presented. The development of an energy–enstrophy double cascade is investigated and its statistics found to be compatible with the classical Kraichnan theory in the limit of extended inertial ranges. The analysis of the joint distribution of energy and enstrophy fluxes in physical space reveals a small value of cross-correlation. This result supports many experimental and numerical studies where only one cascade is generated.

Type
Papers
Information
Journal of Fluid Mechanics , Volume 589 , 25 October 2007 , pp. 253 - 260
Copyright
Copyright © Cambridge University Press 2007

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References

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