Fluctuation-dissipation relations and statistical temperatures in a turbulent von Kármán flow.
We experimentally characterize the fluctuations of the nonhomogeneous nonisotropic turbulence in an axisymmetric von Kármán flow. We show that these fluctuations satisfy relations, issued from the Euler equation, which are analogous to classical fluctuation-dissipation relations in statistical mechanics. We use these relations to estimate statistical temperatures of turbulence.
Monchaux
Romain
R
Service de Physique de l'Etat Condensé, DSM, CEA Saclay, CNRS URA 2464, Gif-sur-Yvette, France.
Cortet
Pierre-Philippe
PP
Chavanis
Pierre-Henri
PH
Chiffaudel
Arnaud
A
Daviaud
François
F
Diribarne
Pantxo
P
Dubrulle
Bérengère
B