Advertisement

Granular Matter

, Volume 4, Issue 4, pp 183–190 | Cite as

Texture of granular surface flows: experimental investigation and biphasic non-local model

  • D. Bonamy
  • F. Daviaud
  • L. Laurent
  • P. Mills

Abstract

 We investigate here the rheology of dense granular surface flow. First, steady surface flows in a rotating drum are studied experimentally and a large number of clusters of `jammed' grains embedded in the flowing layer is evidenced. The clusters size is power-law distributed, from the grain size scale up to the thickness of the flowing layer. Theoretical implications are then discussed and a non-local biphasic rheological law is proposed. The resulting model succeeds quantitatively to account for the unusual shape of the velocity profile within granular surface flows as well as for the different scalings observed in rotating drum experiments.

Keywords Surface flows, Rotating Drums, Avalanches, Reynolds dilatancy, Clustering 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • D. Bonamy
    • 1
  • F. Daviaud
    • 1
  • L. Laurent
    • 1
  • P. Mills
    • 2
  1. 1.Service de Physique de l'Etat Condensé - CEA Saclay, 91191 Gif-sur-Yvette Cedex, FranceFR
  2. 2.Laboratoire de Physique des Matériaux Divisés et des Interfaces - Université Marne la Vallée, 77454 Marne la Vallée Cedex 2, FranceFR

Personalised recommendations