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).
Complete list of metadatas

Cited literature [3 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-00169495
Contributor : Philippe-Emmanuel Roche <>
Submitted on : Tuesday, September 4, 2007 - 10:57:48 AM
Last modification on : Wednesday, February 13, 2019 - 10:06:06 AM
Long-term archiving on: Friday, April 9, 2010 - 1:31:23 AM

Files

RocheBarenghi_versionA.pdf
Files produced by the author(s)

Identifiers

Collections

CNRS | NEEL | UGA

Citation

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⟩

Share

Metrics

Record views

260

Files downloads

162