Unstable blast shocks in dilute granular flows - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Année : 2013

Unstable blast shocks in dilute granular flows

Résumé

Shocks and blasts can be readily obtained in granular flows be they dense or dilute. Here, by examining the propagation of a blast shock in a dilute granular flow, we show that such a front is unstable with respect to transverse variations of the density of grains. This instability has a well-defined wavelength which depends on the density of the medium and has an amplitude which grows as an exponential of the distance traveled. These features can be understood using a simple model for the shock front, including dissipation which is inherent to granular flows. While this instability bears much resemblance to that anticipated in gases, it is distinct and has special features we discuss here.
Fichier principal
Vignette du fichier
BoudetPRE2013.pdf (1.79 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-00834117 , version 1 (15-12-2017)

Licence

Paternité - Partage selon les Conditions Initiales

Identifiants

Citer

Jean-François Boudet, Hamid Kellay. Unstable blast shocks in dilute granular flows. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2013, 87 (5), pp.052202. ⟨10.1103/PhysRevE.87.052202⟩. ⟨hal-00834117⟩

Collections

CNRS LOMA
33 Consultations
73 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More