Geometry of Frictionless and Frictional Sphere Packings
Soft Condensed Matter
2009-11-07 v1
Abstract
We study static packings of frictionless and frictional spheres in three dimensions, obtained via molecular dynamics simulations, in which we vary particle hardness, friction coefficient, and coefficient of restitution. Although frictionless packings of hard-spheres are always isostatic (with six contacts) regardless of construction history and restitution coefficient, frictional packings achieve a multitude of hyperstatic packings that depend on system parameters and construction history. Instead of immediately dropping to four, the coordination number reduces smoothly from as the friction coefficient between two particles is increased.
Cite
@article{arxiv.cond-mat/0111140,
title = {Geometry of Frictionless and Frictional Sphere Packings},
author = {Leonardo E. Silbert and Deniz Ertas and Gary S. Grest and Thomas C. Halsey and Dov Levine},
journal= {arXiv preprint arXiv:cond-mat/0111140},
year = {2009}
}
Comments
6 pages, 9 figures, submitted to Phys. Rev. E