Article Dans Une Revue Physical Review Letters Année : 2022

Statistical Equilibrium of Large Scales in Three-Dimensional Hydrodynamic Turbulence

Résumé

We investigate experimentally three-dimensional (3D) hydrodynamic turbulence at scales larger than the forcing scale. We manage to perform a scale separation between the forcing scale and the container size by injecting energy into the fluid using centimetric magnetic particles. We measure the statistics of the fluid velocity field at scales larger than the forcing scale (energy spectra, velocity distributions, and energy flux spectrum). In particular, we show that the large-scale dynamics are in statistical equilibrium and can be described with an effective temperature, although not isolated from the turbulent Kolmogorov cascade. In the large-scale domain, the energy flux is zero on average but exhibits intense temporal fluctuations. Our work paves the way to use equilibrium statistical mechanics to describe the large-scale properties of 3D turbulent flows.

Fichier principal
Vignette du fichier
GorceFalconPRL2022andSuppMat.pdf (2.12 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Licence

Dates et versions

hal-03715506 , version 1 (06-07-2022)

Licence

Identifiants

Citer

Jean-Baptiste Gorce, Eric Falcon. Statistical Equilibrium of Large Scales in Three-Dimensional Hydrodynamic Turbulence. Physical Review Letters, 2022, 129, pp.054501. ⟨10.1103/PhysRevLett.129.054501⟩. ⟨hal-03715506⟩
117 Consultations
218 Téléchargements

Altmetric

Partager

  • More