Depletion of nonlinearity in two-dimensional turbulence - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physics of Fluids Année : 2014

Depletion of nonlinearity in two-dimensional turbulence

Résumé

The strength of the nonlinearity is measured in decaying two-dimensional turbulence, by com-paring its value to that found in a Gaussian field. It is shown how the nonlinearity drops following a two-step process. First a fast relaxation is observed on a timescale comparable to the time of for-mation of vortical structures, then at long times the nonlinearity relaxes further during the phase when the eddies merge to form the final dynamic state of decay. Both processes seem roughly independent of the value of the Reynolds number.
Fichier principal
Vignette du fichier
DoNL2D.pdf (970.88 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01078165 , version 1 (28-10-2014)

Identifiants

Citer

Andrey Pushkarev, Wouter J.T. Bos. Depletion of nonlinearity in two-dimensional turbulence. Physics of Fluids, 2014, 26, pp.115102. ⟨10.1063/1.4901297⟩. ⟨hal-01078165⟩
50 Consultations
50 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More