Investigation of intermittency in superfluid turbulence

Julien Salort (1) , Benoît Chabaud (1) , Emmanuel Lévêque (2) , Philippe-Emmanuel Roche (1)

1 NEEL - HELFA - Hélium : du fondamental aux applications
2 Phys-ENS - Laboratoire de Physique de l'ENS Lyon

This paper reports new experimental and simulation velocity data for superfluid steady turbulence above 1 K. We present values for the scaling exponent of the absolute value of velocity-increment structure functions. In both experiments and simulations, they evidence that intermittency occurs in superfluid flows in a quite comparable way to classical turbulence. In particular, the deviation from Kolmogorov 1941 keeps the same strength as we cross the superfluid transition. To the best of our knowledge, this is the first confirmation of the superfluid 4He experimental results from Maurer et al. EPL 1998 and the first numerical evidence of intermittency in superfluid turbulence.

Domaines: Autre [cond-mat.other]; Dynamique des Fluides [physics.flu-dyn]; Mécanique des fluides [physics.class-ph]; Mécanique des fluides [physics.class-ph]

Julien Salort, Benoît Chabaud, Emmanuel Lévêque, Philippe-Emmanuel Roche. Investigation of intermittency in superfluid turbulence. Journal of Physics: Conference Series, 2011, 318, pp.042014. ⟨10.1088/1742-6596/318/4/042014⟩. ⟨hal-00640529⟩