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Morphology of Polydisperse Granular Media

In: Traffic and Granular Flow ’07

Author

Listed:
  • Charles Voivret

    (Université Montpellier II, Place Eugène Bataillon, LMGC, CNRS)

  • Jean-Yves Delenne

    (Université Montpellier II, Place Eugène Bataillon, LMGC, CNRS)

  • Moulay Saïd El Youssoufi

    (Université Montpellier II, Place Eugène Bataillon, LMGC, CNRS)

  • Farhang Radjaï

    (Université Montpellier II, Place Eugène Bataillon, LMGC, CNRS)

Abstract

Summary We investigate the morphology and space-filling properties of polydisperse densely-packed granular media in 2D. A numerical procedure is introduced to generate collections of circular particles with size distributions of variable size span. This particle generation procedure is used with a geometric deposition protocol in order to build large close-packed samples of prescribed polydispersity. The solid fraction is a strongly nonlinear function of the size span, and the highest levels of solid fraction occur for the uniform distribution by volume fractions. A transition occurs from a regime of topological disorder where the packing properties are governed by particle connectivity to a regime of metric disorder where pore-filling small particles prevail. The polydispersity manifests itself in the first regime through the variability of local coordination numbers. In the second regime, the material is homogeneous beyond only a few average particle diameters. We also show that the fabric anisotropy declines with size span.

Suggested Citation

  • Charles Voivret & Jean-Yves Delenne & Moulay Saïd El Youssoufi & Farhang Radjaï, 2009. "Morphology of Polydisperse Granular Media," Springer Books, in: Cécile Appert-Rolland & François Chevoir & Philippe Gondret & Sylvain Lassarre & Jean-Patrick Lebacq (ed.), Traffic and Granular Flow ’07, pages 587-596, Springer.
    • Handle: RePEc:spr:sprchp:978-3-540-77074-9_63
    DOI: 10.1007/978-3-540-77074-9_63
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