On the decay of turbulence in plane Couette flow - École polytechnique Accéder directement au contenu
Article Dans Une Revue Fluid Dynamics Research Année : 2011

On the decay of turbulence in plane Couette flow

Résumé

Upon decreasing the Reynolds number, plane Couette flow first forms alternately turbulent and laminar oblique bands out of featureless turbulence below some upper threshold Ret. These bands exist down to a global stability threshold Reg below which laminar flow ultimately prevails. We study the fragmentation and decay of these bands in systems that are extended enough for several bands to exist. We use direct numerical simulations appropriately tailored to deal with such large systems during long enough durations. We point out a two-stage process involving the rupture of a band and then its slow shrinking. Previous interpretations of turbulence decay in wall-bounded flows within the chaotic transient or spatiotemporal intermittency paradigms are discussed.
Fichier principal
Vignette du fichier
1873-7005_43_6_065501.pdf (4.27 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-01025564 , version 1 (18-07-2014)

Identifiants

Citer

Paul Manneville. On the decay of turbulence in plane Couette flow. Fluid Dynamics Research, 2011, 43 (6), pp.065501. ⟨10.1088/0169-5983/43/6/065501⟩. ⟨hal-01025564⟩
113 Consultations
381 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More