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Cluster kinetics model of particle separation in vibrated granular media

McCoy, Benjamin J and Madras, Giridhar (2006) Cluster kinetics model of particle separation in vibrated granular media. In: Physical Review E, 73 (1). 011301-1-5.

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We model the Brazil-nut effect (BNE) by hypothesizing that granules form clusters that fragment and aggregate. This provides a heterogeneous medium in which the immersed intruder particle rises (BNE) or sinks (reverse BNE)according to relative convection currents and buoyant and drag forces. A simple relationship proposed for viscous drag in terms of the vibrational intensity and the particle to grain density ratio allows simulation of published experimental data for rise and sink times as functions of particle radius, initial depth of the particle, and particle-grain density ratio. The proposed model correctly describes the experimentally observed maximum in risetime.

Item Type: Journal Article
Publication: Physical Review E
Publisher: The American Physical Society
Additional Information: Copyright of this article belongs to The American Physical Society.
Department/Centre: Division of Mechanical Sciences > Chemical Engineering
Date Deposited: 13 Dec 2006
Last Modified: 19 Sep 2010 04:32
URI: http://eprints.iisc.ac.in/id/eprint/9049

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