Segregation of granular materials in rotating cylinders

D.V. Khakhar, Ashish V. Orpe and S.K. Hajra

Physica A: Statistical Mechanics and its Applications, 2003, vol. 318, issue 1, 129-136

Abstract: Mixtures of flowing granular materials containing particles of different sizes or different densities have a tendency to segregate. We focus here on the segregation that occurs in the cross-section of the cylinder using short cylinders (axial length is much smaller than the diameter) ensuring small variation along the cylinder axis. The typical structure formed in these systems is a radial core of the smaller or more dense particles. Coupling of composition with flow can lead to instability causing a pattern of radial streaks. The predictions of hard sphere mixture theories are briefly discussed first. Results of experimental and modelling studies of segregation are reviewed for density-induced radial segregation of equal sized particles, and size-induced radial streak formation. Experimental results for size-induced radial segregation are presented.

Keywords: Granular flow; Segregation; Rotating cylinder; Surface flow (search for similar items in EconPapers)
Date: 2003
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:318:y:2003:i:1:p:129-136

DOI: 10.1016/S0378-4371(02)01416-4

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