Nonlinear Sciences – Chaotic Dynamics
Scientific paper
2001-11-29
Nonlinear Sciences
Chaotic Dynamics
4 pages, 7 figures
Scientific paper
10.1103/PhysRevE.66.026304
We study the statistics of the vorticity field in two-dimensional Navier-Stokes turbulence with a linear Ekman friction. We show that the small-scale vorticity fluctuations are intermittent, as conjectured by Nam et al. [Phys. Rev. Lett. vol.84 (2000) 5134]. The small-scale statistics of vorticity fluctuations coincides with the one of a passive scalar with finite lifetime transported by the velocity field itself.
Boffetta Guido
Celani Antonio
Musacchio Stefano
Vergassola Massimo
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