ntermittency in two-dimensional Ekman-Navier-Stokes turbulence

Creators: Boffetta, Guido; Celani, Antonio; Musacchio, S.; Vergassola, Massimo

Others:: Dipartimento di Fisica Generale [Torino] ; Università degli studi di Torino = University of Turin (UNITO); Institut Non Linéaire de Nice Sophia-Antipolis (INLN) ; Université Nice Sophia Antipolis (1965 - 2019) (UNS) ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS); Laboratoire de Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides (CASSIOPEE) ; Université Nice Sophia Antipolis (1965 - 2019) (UNS) ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS); Dipartimento di Fisica [Roma La Sapienza] ; Università degli Studi di Roma "La Sapienza" = Sapienza University [Rome] (UNIROMA); SMC-INFM ; Università degli Studi di Roma "La Sapienza" = Sapienza University [Rome] (UNIROMA)-Dipartemento du Fisica

Description

We study the statistics of the vorticity field in two-dimensional Navier-Stokes turbulence with linear Ekman friction. We show that the small-scale vorticity fluctuations are intermittent, as conjectured by Bernard [Europhys. Lett. 50, 333 (2000)] and Nam et al. [Phys. Rev. Lett. 84, 5134 (2000)]. The small-scale statistics of vorticity fluctuations coincide with that of a passive scalar with finite lifetime transported by the velocity field itself.

Abstract

4 pages

ntermittency in two-dimensional Ekman-Navier-Stokes turbulence

Description

Abstract

Additional details