Vortex density spectrum of quantum turbulence

The fluctuations of the vortex density in a turbulent quantum fluid are deduced from local second-sound attenuation measurements. These measurements are performed with a micromachined open-cavity resonator inserted across a flow of turbulent He-II near 1.6 K. The power spectrum of the measured vorte...

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Bibliographic Details
Published inarXiv.org
Main Authors Roche, Philippe-Emmanuel P -E, Diribarne, Pantxo, Didelot, Thomas, Français, Olivier, Rousseau, Lionel, Willaime, Hervé
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 08.01.2007
Subjects
Attenuation
Cavity resonators
Density
Fluid dynamics
Fluid flow
Micromachining
Quantum turbulence
Sound attenuation
Turbulent flow
Variation
Vortices
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Summary:The fluctuations of the vortex density in a turbulent quantum fluid are deduced from local second-sound attenuation measurements. These measurements are performed with a micromachined open-cavity resonator inserted across a flow of turbulent He-II near 1.6 K. The power spectrum of the measured vortex line density is compatible with a (-5/3) power law. The physical interpretation, still open, is discussed.
ISSN:2331-8422
DOI:10.48550/arxiv.0701136