Отправлено: 22.08.08 01:58. Заголовок: Simulation of the packing of granular mixtures of non-convex particles and voids characterization

Simulation of the packing of granular mixtures of non-convex particles and voids characterization
S. RЁ¦mond1 , J. L. Gallias1 and A. Mizrahi2
Granular Matter
Springer Berlin / Heidelberg
ISSN 1434-5021 (Print) 1434-7636 (Online)
Volume 10, Number 3 / §®§С§в§д 2008 §Ф.
DOI 10.1007/s10035-007-0082-y
pp. 157-170

Simulation of the packing of granular mixtures of non-convex particles and voids characterization
S. RЁ¦mond1 , J. L. Gallias1 and A. Mizrahi2

(1) L2MGC, EA 4114, UniversitЁ¦ de Cergy-Pontoise, 5 Mail Gay-Lussac, Neuville sur Oise, 95031 Cergy-Pontoise Cedex, France
(2) DЁ¦partment de MathЁ¦matiques, UniversitЁ¦ de Cergy-Pontoise, 2 av. Rodolphe Chauvin, Pontoise, 95302 Cergy-Pontoise Cedex, France

Received: 6 March 2007

Abstract The simulation of granular materials has considerably developed in the last decades essentially with simple geometry particles. The purpose of this paper is to study granular systems of non-convex particles which are present in many industrial processes. Two shapes of large and two shapes of small non-convex particles resulting from the cutting of a hollow cylinder are modelled, and binary mixtures containing varying proportions of small and large particles are generated with a Monte Carlo simulation. Two different states of the granular systems are studied: suspensions and packings obtained after sedimentation. No contact force model is used and only steric repulsion is taken into account. The density, the pore size distribution and the tortuosity of the granular systems are studied. The results are compared to those obtained with granular systems of convex particles.

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