Densest Packings of Binary Frictional Particles

ORAL

Abstract

Using a pressure-controlled discrete element method, implementing a highly efficient neighbor-detection algorithmic scheme, we have generated a large number of binary sphere-packings spanning a wide range in particle size ratio and filling fraction of small particles, over several orders of magnitude in particle friction coefficient. Our results are consistent with a generalized Furnas model [1] that takes into account friction dependence of the global packing fraction φJ. Our systems approach the theoretical result in the limit of large size ratios (20:1), with packings containing 1-10 million spheres. We provide evidence that the densest mechanically-stable jammed packings of binary frictional particles (circa φJ ~ 0.82 - 0.85) are produced at a friction-dependent optimal composition of large and small particles.


[1] C. C. Furnas, Ind. Eng. Chem. 23, 1052 (1931)

*Sandia National Laboratories is a multimission laboratory managed and operated by National Technology & Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525. Sand No.

–

Presenters

  • Leo Silbert

    • Central New Mexico Community College

Authors

  • Leo Silbert

    • Central New Mexico Community College

  • Ishan Srivastava

    • Lawrence Berkeley National Laboratory
    • Center for Computational Sciences and Engineering, §Lawrence Berkeley National Laboratory
    • Sandia National Laboratories
    • Center for Computational Sciences and Engineering, Lawrence Berkeley National Laboratory

  • Scott Roberts

    • Sandia National Laboratories

  • Gary Grest

    • Sandia National Laboratories
    • Sandia National Laboratories, Albuquerque, NM, United States,87123
    • Sandia National Laboratories, Albuquerque, NM

  • Jeremy Lechman

    • Sandia National Laboratories