Rheology of Aspherical Granular Particles
ORAL
Abstract
We investigate the flow behavior of aspherical, granular particles in
planar-shear flow geometry using large-scale computer
simulations. Specifically, we explore how grain shape and friction influence
the constitutive "mu-of-I" rheology. We find that over a spectrum of grain
shapes, spanning spheres to cubes, particle friction affects the rheological
characterization more so than particle shape. Whereas, for a given particle
friction coefficient, particle shape affects the value of the bulk, dynamic
friction or stress aniostropy. We characterize these different flow regimes
using a range of structural and flow parameters.
planar-shear flow geometry using large-scale computer
simulations. Specifically, we explore how grain shape and friction influence
the constitutive "mu-of-I" rheology. We find that over a spectrum of grain
shapes, spanning spheres to cubes, particle friction affects the rheological
characterization more so than particle shape. Whereas, for a given particle
friction coefficient, particle shape affects the value of the bulk, dynamic
friction or stress aniostropy. We characterize these different flow regimes
using a range of structural and flow parameters.
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Presenters
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Leo Silbert
Physics, SIU Carbondale, Southern Illinois University Carbondale, Physics, Southern ILUniv-Carbondale, Dept. of Physics, Southern Illinois University
Authors
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K. Michael Salerno
US Naval Research Lab, US Naval Research Laboratory, National Research Council, U S Naval Research
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Dan Bolintineanu
Sandia National Laboratories
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Gary Grest
Sandia Natl Labs, Sandia National Laboratories
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Jeremy Lechman
Sandia National Laboratories
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Steven Plimpton
Sandia National Laboratories
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Ishan Srivastava
Sandia Natl Labs, Sandia National Laboratories
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Leo Silbert
Physics, SIU Carbondale, Southern Illinois University Carbondale, Physics, Southern ILUniv-Carbondale, Dept. of Physics, Southern Illinois University