| Issue |
Europhys. Lett.
Volume 50, Number 3, May I 2000
|
|
|---|---|---|
| Page(s) | 333 - 339 | |
| Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
| DOI | https://doi.org/10.1209/epl/i2000-00275-y | |
| Published online | 01 September 2002 | |
Influence of friction on the direct cascade of the 2d forced turbulence
Service de Physique Théorique de Saclay
Laboratoire de la Direction des Sciences de la
Matière du Commisariat à l'Energie Atomique
F-91191, Gif-sur-Yvette, France
Corresponding author: dbernard@spht.saclay.cea.fr
Received:
3
May
1999
Accepted:
24
February
2000
We discuss two possible scenarios for the direct cascade in two-dimensional turbulent systems in the presence of friction which differ by the presence or not of enstrophy dissipation in the inviscid limit. They are distinguished by the existence or not of a constant enstrophy transfer and by the presence of leading anomalous scaling in the velocity three-point functions. We also point out that the velocity statistics becomes Gaussian in the approximation consisting in neglecting odd-order correlations in front of even-order ones.
PACS: 47.10.+g – General theory / 47.27.Gs – Isotropic turbulence; homogeneous turbulence
© EDP Sciences, 2000
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