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Analysis of radial segregation of granular mixtures in a rotating drum

Chakraborty, S and Nott, Prabhu R and Prakash, Ravi J (2000) Analysis of radial segregation of granular mixtures in a rotating drum. In: European Physical Journal E, 1 (4). pp. 265-273.

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This paper considers the segregation of a granular mixture in a rotating drum. Extending a recent kinematic model for grain transport on sandpile surfaces to the case of rotating drums, an analysis is presented for radial segregation in the rolling regime, where a thin layer is avalanching down while the rest of the material follows rigid body rotation. We argue that segregation is driven not just by differences in the angle of repose of the species, as has been assumed in earlier investigations, but also by differences in the size and surface properties of the grains. The cases of grains differing only in size (slightly or widely) and only in surface properties are considered, and the predictions are in qualitative agreement with observations. The model yields results inconsistent with the assumptions for more general cases, and we speculate on how this may be corrected.

Item Type: Journal Article
Publication: European Physical Journal E
Publisher: Springer Berlin / Heidelberg
Additional Information: Copyright of this artical belongs to Springer Berlin/ Heidelberg.
Department/Centre: Division of Mechanical Sciences > Chemical Engineering
Date Deposited: 26 Jun 2006
Last Modified: 19 Sep 2010 04:29
URI: http://eprints.iisc.ac.in/id/eprint/7712

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