Thermal and force-chain effects in an experimental, sloping granular shear flow

Auteur(s) et Affiliation(s)

FURBISH, D.J.

Dept. of Earth and Environmental Sciences and Civil and Environmental Engineering, Vanderbilt Univ., Nashville, Etats-Unis

SCHMEECKLE, M.W.

School of Geographical Sciences, Arizona State Univ., Tempe, Etats-Unis

ROERING, J.J.

Dept. of Geological Sciences, Univ. of Oregon, Eugene, Etats-Unis

Description :
Force chains figure prominently in shearing motions of granular materials. A simple scaling of the forces involved in the motion of a dry, gravity driven granular shear flow induced by vibrations suggests that this shearing motion reflects a balance between the rate of production and the rate of disruption of granular force chains. The analysis is empirically consistent with the exponential-like profiles of grain displacement, and the strongly nonlinear increase in grain flux with increasing surface slope, observed in experiments.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2008, vol. 33, n°. 13, p. 2108-2117, nombre de pages : 10, Références bibliographiques : 25 ref.

Date :
2008

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais