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Confined packings of frictionless spheres and polyhedra

Authors
  • Camenen, Jean-François
  • Descantes, Yannick
  • Richard, Patrick
Type
Published Article
Publication Date
Jul 22, 2013
Submission Date
Jul 22, 2013
Identifiers
DOI: 10.1063/1.4811932
Source
arXiv
License
Yellow
External links

Abstract

By means of numerical simulations, we study the influence of confinement on three-dimensional random close packed (RCP) granular materials subject to gravity. The effects of grain shape (spherical or polyhedral) and polydispersity on this dependence are investigated. In agreement with a simple geometrical model, the solid fraction is found to decrease linearly for increasing confinement no matter the grain shape. This decrease remains valid for bidisperse sphere packings although the gradient seems to reduce significantly when the proportion of small particles reaches 40% by volume. The aforementioned model is extended to capture the effect of the confinement on the coordination number.

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