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Granular Patterns$
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Igor Aranson and Lev Tsimring

Print publication date: 2008

Print ISBN-13: 9780199534418

Published to Oxford Scholarship Online: January 2009

DOI: 10.1093/acprof:oso/9780199534418.001.0001

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Patterns in granular segregation

Patterns in granular segregation

(p.167) 7 Patterns in granular segregation
Granular Patterns

Igor S. Aranson

Lev S. Tsimring

Oxford University Press

This chapter contains an overview of experiments and theories on segregation occurring in heterogeneous granular materials. One of the most fascinating features of heterogeneous (i.e., consisting of different distinct components) granular materials is their tendency to segregate under external agitation rather than to mix, as one would expect from the naive entropy consideration. Various basic segregation mechanisms (e.g., entropic segregations, kinetic sieving, granular convection, condensation, etc.) and various experimental manifestations of granular segregation (e.g., granular stratification in surface flows, radial and axial segregation in rotating drums and related theoretical concepts, including discrete cellular automata and continuum phenomenological models) are discussed.

Keywords:   radial segregation, axial segregation, stratification, convection, sieving, cellular automata, continuum models

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