Accéder directement au contenu Accéder directement à la navigation
Pré-publication, Document de travail

Local measurement of vortex statistics in quantum turbulence

Abstract : The density fluctuations of quantum vortex lines are measured in a turbulent flow of superfluid He, at temperatures corresponding to superfluid fraction of 16%, 47% and 81%. The probe is a micro-fabricated second sound resonator that allows for local and small-scale measurements in the core of the flow, at a 10-mesh-size behind a grid. Remarkably, all the vortex power spectra collapse on a single master curve, independently from the superfluid fraction and the mean velocity. By contrast with previous measurements, we report an absence of power law scaling of the power spectra. The vortex density probability distributions are found to be strongly skewed, similarly to the vorticity distributions observed in classical turbulence. Implications of those results are discussed.
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-03142850
Contributeur : Eric Woillez <>
Soumis le : lundi 22 février 2021 - 10:44:10
Dernière modification le : mercredi 24 février 2021 - 09:51:59

Fichiers

main.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

  • HAL Id : hal-03142850, version 1
  • ARXIV : 2102.10866

Collections

UGA | CNRS | NEEL

Citation

Eric Woillez, Philippe-E Roche. Local measurement of vortex statistics in quantum turbulence. 2021. ⟨hal-03142850⟩

Partager

Métriques

Consultations de la notice

12