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Molecular dynamics simulation of complex particles in three dimensions and the study of friction due to nonconvexity

S. A. Galindo-Torres, F. Alonso-Marroquín, Y. C. Wang, D. Pedroso, and J. D. Muñoz Castaño
Phys. Rev. E 79, 060301(R) – Published 22 June 2009

Abstract

We investigate the macroscopic properties of frictionless nonconvex particles using molecular dynamics. The calculations are based on a simple and efficient method to simulate complex-shaped interacting bodies. The particle shape is represented by Minkowski operators. A multicontact time-continuous interaction between bodies is derived using simple concepts of computational geometry. Three-dimensional simulations of hopper flow show that the nonconvexity of the particles strongly affects the jamming on granular flow. Also the model allows the representation of complex bodies with rough surfaces as in friction studies and the reproduction of a wide range of friction and dilatancy angles as in true triaxial tests.

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  • Received 18 November 2008

DOI:https://doi.org/10.1103/PhysRevE.79.060301

©2009 American Physical Society

Authors & Affiliations

S. A. Galindo-Torres1,4,*, F. Alonso-Marroquín1,†, Y. C. Wang2, D. Pedroso3, and J. D. Muñoz Castaño4

  • 1MoSCoS, School of Mathematics and Physics, The University of Queensland, Queensland, Brisbane 4068, Australia
  • 2CSIRO Exploration and Mining, Technology Court, Pullenvale, Queensland 4069, Australia
  • 3Golder Geomechanics Center, The University of Queensland, Queensland, Brisbane 4068, Australia
  • 4Grupo de Simulación de Sistemas Físicos, Universidad Nacional de Colombia, Cra 30 cll 45, Bogotá, Colombia

  • *s.galinotorres@uq.edu.au
  • fernando@physics.uq.edu.au

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Issue

Vol. 79, Iss. 6 — June 2009

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