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Vortex spectrum in superfluid turbulence: Interpretation of a recent experiment

Lookup NU author(s): Professor Carlo Barenghi

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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). © Europhysics Letters Association.


Publication metadata

Author(s): Roche P-E, Barenghi CF

Publication type: Article

Publication status: Published

Journal: Europhysics Letters

Year: 2008

Volume: 81

Issue: 3

Pages: -

ISSN (print): 0295-5075

ISSN (electronic): 1286-4854

Publisher: EDP Sciences

URL: http://dx.doi.org/10.1209/0295-5075/81/36002

DOI: 10.1209/0295-5075/81/36002


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