Molecular dynamics simulations of hard sphere granular particles

We use molecular dynamics to study the two dimensional granular flow of particles that interact with each other via a hard sphere potential with inelastic collisions characterized by a coefficient of restitution. The particles are confined in a two dimensional box that contains a hole at the bottom...

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Bibliographic Details
Published in:Physica A 1992-08, Vol.187 (1), p.159-171
Main Authors: Hong, D.C., McLennan, J.A.
Format: Article
Language:English
Subjects:
Classical and quantum physics: mechanics and fields
Classical mechanics of continuous media: general mathematical aspects
Exact sciences and technology
Physics
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Summary:We use molecular dynamics to study the two dimensional granular flow of particles that interact with each other via a hard sphere potential with inelastic collisions characterized by a coefficient of restitution. The particles are confined in a two dimensional box that contains a hole at the bottom through which particles flow under the influence of gravity. The particles develop coherent flow patterns that look similar to those seen in observations of real granular flow. The velocities of discharging particles through the hole is independent of the depth. We also study the fluidization of the granular particles that sets in when the bottom wall undergoes harmonic oscillation. The dense hard spehere gas is found to reproduce many of the unique features of the granular flow.
ISSN:0378-4371
1873-2119
DOI:10.1016/0378-4371(92)90416-N