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Article Dans Une Revue Proceedings of the National Academy of Sciences of the United States of America Année : 2014

Experimental, numerical and analytical velocity spectra in turbulent quantum fluid

Résumé

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.
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Dates et versions

hal-00820182 , version 1 (03-05-2013)
hal-00820182 , version 2 (12-02-2014)

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Carlo Barenghi, Victor L'Vov, Philippe-Emmanuel Roche. Experimental, numerical and analytical velocity spectra in turbulent quantum fluid. Proceedings of the National Academy of Sciences of the United States of America, 2014, 111 (Suppl. 1), pp.4683-4690. ⟨10.1073/pnas.1312548111⟩. ⟨hal-00820182v2⟩

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