| Issue |
Europhys. Lett.
Volume 61, Number 4, February 2003
|
|
|---|---|---|
| Page(s) | 492 - 498 | |
| Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
| DOI | https://doi.org/10.1209/epl/i2003-00156-5 | |
| Published online | 01 February 2003 | |
Wall effects on granular heap stability
1
FAST Universités Paris 6 & 11 et CNRS (UMR
7608) Bât. 502, campus universitaire, 91405
Orsay cedex, France
2
LPMC Universités Paris 6 & 7, ENS et CNRS
(UMR 8551) 24 rue Lhomond, 75005 Paris, France
Received:
29
July
2002
Accepted:
6
December
2002
We investigate the effects of lateral walls on the angle of movement and on the angle of repose of a granular pile. Our experimental results for beads immersed in water are similar to previous results obtained in air and to recent numerical simulations. All of these results, showing an increase of pile angles with a decreasing gap width, are explained by a model based on the redirection of stresses through the granular media. Two regimes are observed depending on the bead diameter. For large beads, the range of wall effects corresponds to a constant number of beads, whereas it corresponds to a constant characteristic length for small beads as they aggregate via van der Waals forces.
PACS: 45.70.Ht – Avalanches / 45.70.-n – Granular systems / 45.05.+x – General theory of classical mechanics of discrete systems
© EDP Sciences, 2003
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