Vortex spectrum in superfluid turbulence: interpretation of a recent experiment

Abstract : We discuss a recent experiment in which the spectrum of the vortex line density fluctuations has been measured in superfluid turbulence. The observed frequency dependence of the spectrum, $f^{-5/3}$, disagrees with classical vorticity spectra if, following the literature, the vortex line density is interpreted as a measure of the vorticity or enstrophy. We argue that the disagrement is solved if the vortex line density field is decomposed into a polarised field (which carries most of the energy) and an isotropic field (which is responsible for the spectrum).
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https://hal.archives-ouvertes.fr/hal-00169495
Contributeur : Philippe-Emmanuel Roche <>
Soumis le : mardi 4 septembre 2007 - 10:57:48
Dernière modification le : jeudi 18 octobre 2018 - 12:18:05
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Philippe-Emmanuel Roche, Carlo Barenghi. Vortex spectrum in superfluid turbulence: interpretation of a recent experiment. EPL - Europhysics Letters, European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing, 2008, 81, pp.36002. 〈10.1209/0295-5075/81/36002〉. 〈hal-00169495〉

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