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Lookup NU author(s): Professor Carlo Barenghi
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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.
Author(s): Roche P-E, Barenghi CF
Publication type: Article
Publication status: Published
Journal: Europhysics Letters
ISSN (print): 0295-5075
ISSN (electronic): 1286-4854
Publisher: EDP Sciences
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