Radial and axial segregation of granular matter in a rotating cylinder: A simulation study

Abstract

The phenomena of radial and axial segregation in a horizontal rotating cylinder containing a mixture of granular particles of two different species have been modeled using discrete particle simulation. Space-time plots and detailed imagery provide a comprehensive description of what occurs in the system. As is the case experimentally, the nature of the segregation depends on the parameters defining the problem; the radial component of the segregation may be transient or long-lasting, and the axial component may or may not develop. Simulations displaying the different kinds of behavior are described and the particle dynamics associated with the axially segregated state examined. The importance of an appropriate choice of interaction for representing the effective friction force is demonstrated.

11 pages, 15 figures (low resolution color figures only; originals at author's website http://www.ph.biu.ac.il/~rapaport/research/granular.html); revised version (fewer figures and minor changes)

References in corpus (4)

• Granular flow down an inclined plane: Bagnold scaling and rheology
• Simulational studies of axial granular segregation in a rotating cylinder
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Cited by in corpus (6)

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• The mechanism of long-term coarsening of granular mixtures in rotating drums
• Molecular dynamics simulation: a tool for exploration and discovery using simple models
• On the relevance of numerical simulations to booming sand
• Origin of granular axial segregation bands in a rotating tumbler: An interface-mixing driven Rayleigh-Taylor instability
• Granular segregation in dense systems: the role of statistical mechanics and entropy