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.
*K.M.S. was supported in part by the National Research Council Associateship
Program at the US Naval Research Laboratory. This work was performed, in part,
at the Center for Integrated Nanotechnologies, a U.S. Department of Energy and
Office of Basic Energy Sciences user facility. Sandia Natio
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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