Turbulent velocity spectra in a quantum fluid: experiments, numerics and theory

Carlo Barenghi (1) , Victor S. L'Vov (2) , Philippe-Emmanuel Roche (3)

1 School of Mathematics and Statistics
2 Dept Chem. Phys
3 NEEL - HELFA - Hélium : du fondamental aux applications

Turbulence in superfluid helium is unusual and presents a challenge to fluid dynamicists because it consists of two coupled, inter penetrating turbulent fluids: the first is inviscid with quantised vorticity, the second is viscous with continuous vorticity. Despite this double nature, the observed spectra of the superfluid turbulent velocity at sufficiently large length scales are similar to those o ordinary turbulence. We present experimental, numerical and theoretical results which explain these similarities, and illustrate the limits of our present understanding of superfluid turbulence at smaller scales.

Mots clés: turbulence; superfluide; turbulence quantique; review

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

Carlo Barenghi, Victor S. L'Vov, Philippe-Emmanuel Roche. Turbulent velocity spectra in a quantum fluid: experiments, numerics and theory. 2013. ⟨hal-00820182v1⟩