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Dense Granular Poiseuille Flow

Published online by Cambridge University Press:  18 July 2011

E. Khain
E. Khain*
Affiliation:
Department of Physics, Oakland University, Rochester MI 48309, USA
*
⋆Corresponding author. E-mail: khain@oakland.edu
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Abstract

We consider a dense granular shear flow in a two-dimensional system. Granular systems(composed of a large number of macroscopic particles) are far from equilibrium due toinelastic collisions between particles: an external driving is needed to maintain themotion of particles. Theoretical description of driven granular media is especiallychallenging for dense granular flows. This paper focuses on a gravity-driven densegranular Poiseuille flow in a channel. A special focus here is on the intriguingphenomenon of fluid-solid coexistence: a solid plug in the center of the system,surrounded by fluid layers. To find and analyze various flow regimes, a multi-scaleapproach is taken. On macro scale, granular hydrodynamics is employed. On micro scale,event-driven molecular dynamics simulations are performed. The entire phase diagram ofparameters is explored, in order to determine which flow regime occurs in various regionsin the parameter space.

Keywords

granular matterpoiseuille flowshear flowmd simulationstwo-phase flow
Type
Research Article
Information
Mathematical Modelling of Natural Phenomena , Volume 6 , Issue 4: Granular hydrodynamics , 2011 , pp. 77 - 86
Copyright
© EDP Sciences, 2011

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