Numéro |
J. Phys. I France
Volume 2, Numéro 4, April 1992
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Page(s) | 389 - 392 | |
DOI | https://doi.org/10.1051/jp1:1992104 |
DOI: 10.1051/jp1:1992104
J. Phys. I France 2 (1992) 389-392
Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Calcutta-700064, India
© Les Editions de Physique 1992
J. Phys. I France 2 (1992) 389-392
Instabilities in a sandpile under vibration
B.K. Chakrabarti and M. AcharyyaSaha Institute of Nuclear Physics, 1/AF Bidhannagar, Calcutta-700064, India
(Received 25 November 1991, accepted in final form 15 January 1992)
Abstract
We Consider the mechanical stability of a (static) pile or heap of grains, modelled as hard spheres. We consider the limiting
stability of a random (stochastic) heap of hard spheres with perfectly smooth surfaces. Roughness of the surface of the spheres
gives additional contribution to the angle of repose. These considerations for the stability of the heap are then extended
for vibrations and a scenario is developed to explain the convective current in the vibrating heap.
© Les Editions de Physique 1992