Particle shape versus friction in granular jamming

What is the influence of sand grain shapes on an hourglass accuracy, and how does it affect the jamming probability? We study such a question using numerical simulation and our recently introduced spheropolyhedral particles. Spheropolyhedra constitute a very rich class of shapes that naturally generalize the traditional spheres used in the Distinct Element Model. Our experiment consists in pouring particles into a container pierced with a circular opening, and to note whether they flow or jam. By repeating this experiment, one can evaluate the jamming probability of a given granular assembly. We show here that intuition is misleading: while the jamming probability is clearly dependent on friction, it does not show a dependence on particle sharpness.


Editor(s):
Nakagawa, Masami
Luding, Stefan
Published in:
Powders and Grains 2009, 499-502
Presented at:
Powders and Grains 2009, Golden, CO, July 13-17, 2009
Year:
2009
Publisher:
AIP
Keywords:
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 Record created 2009-05-11, last modified 2018-09-13

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