Dense flows of bidisperse assemblies of disks down an inclined plane - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Accéder directement au contenu
Communication Dans Un Congrès Année : 2005

Dense flows of bidisperse assemblies of disks down an inclined plane

Résumé

Using molecular dynamics simulations, we have studied the flow down a rough inclined plane of a bidisperse assembly of frictional cohesionless disks, characterized by the size ratio and the proportion of large grains. We have restricted our study to steady uniform flows, once a stable segregation has developed inside the flowing layer. The material is segregated in three layers : a basal layer made of small grains, a superficial layer made of large grains, and a mixed layer in the center. In a certain range of parameters of the mixture, this structure leads to a localization of the shear near the rough bed. Moreover, like for slightly polydisperse assemblies, we measure an approximately linear increase of the effective friction as a function of the ratio of the Froude number and the height of the flowing layer. We compare those results with the prediction of a simple two-layer model.
Fichier non déposé

Dates et versions

hal-02587647 , version 1 (15-05-2020)

Identifiants

Citer

P. Rognon, Mohamed Naaim, J. Roux, F. Chevoir. Dense flows of bidisperse assemblies of disks down an inclined plane. Powders and grains, Stuttgart,DEU ,juillet 2005, 2005, Stuttgart, Germany. pp.4. ⟨hal-02587647⟩
13 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More