Volume 47, Number 3, August I 1999
|Page(s)||324 - 330|
|Section||Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics|
|Published online||01 September 2002|
Sensitivity of granular surface flows to preparation
Laboratoire de Physique Statistique de l'ENS 24 rue Lhomond, 75231 Paris Cedex 05, France
Accepted: 25 May 1999
The transient surface granular flow occurring when a cylindrical pile of granular media supported by a disc crumbles to form a cone is investigated. The experiments show that this flow depends strongly on the way the granular material was prepared. We found a clear dependence on the density of the packing, leading from a deep bulk flow for low densities to an erosive surface flow for high ones. But the flow is also sensitive to possible asymmetries of the internal structure of the material.
PACS: 47.50.+d – Non-Newtonian fluid flows / 83.50.Lh – Interfacial and free surface flows; slip / 45.05.+x – General theory of classical mechanics of discrete systems
© EDP Sciences, 1999
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