Self-adaptation and viscous selection in concentrated two-dimensional vortex dipoles - École polytechnique Accéder directement au contenu
Article Dans Une Revue Physics of Fluids Année : 2000

Self-adaptation and viscous selection in concentrated two-dimensional vortex dipoles

Résumé

In this Letter we deal with 2D direct numerical simulations of concentrated vortex dipoles. We show that various initial dipolar vorticity distributions evolve towards a specific family of dipoles parametrized by the dipole aspect ratio a/b, where a is the radius of the vortices based on the vorticity polar moment in half a plane and b is the separation between the vortex centroids. This convergence is achieved through viscous effects. The considered Reynolds numbers Re= G/v are Re= 3000 and Re= 15000. Moreover, all the dipoles of this family are quasi-steady solutions of the Euler equations. Their scatter plots and drift velocities are given for a/b<03. © 2000 American Institute of Physics.
Fichier principal
Vignette du fichier
1.870325.pdf (265.48 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-01025367 , version 1 (11-09-2014)

Identifiants

Citer

D. Sipp, L. Jacquin, Carlo Cosssu. Self-adaptation and viscous selection in concentrated two-dimensional vortex dipoles. Physics of Fluids, 2000, 12 (2), pp.245-248. ⟨10.1063/1.870325⟩. ⟨hal-01025367⟩
407 Consultations
430 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More