A perspective on vibration-induced size segregation of granular materials

Document Type

Article

Publication Date

1-16-2002

Abstract

Segregation of particulate mixtures is a problem of great consequence in industries involved with the handling and processing of granular materials in which homogeneity is generally required. While there are several factors that may be responsible for segregation in bulk solids, it is well accepted that nonuniformity in particle size is a fundamental contributor. When the granular material is exposed to vibrations, the question of whether or not convection is an essential ingredient for size segregation is addressed by distinguishins between the situation where vibrations are not sufficiently energetic to promote a mean flow of the bulk solid, and those cases where a convective flow does occur. Based on experimental and simulation results in the literature, as well as dynamical systems analysis of a recent model of a binary granular mixture, it is proposed that "void-filling" beneath large particles is a universal mechanism promoting segregation, while convection essentially provides a means of mixing enhancement. © 2002 Elsevier Science Ltd. All rights reserved.

Identifier

0037116634 (Scopus)

Publication Title

Chemical Engineering Science

External Full Text Location

https://doi.org/10.1016/S0009-2509(01)00380-3

ISSN

00092509

First Page

265

Last Page

275

Issue

2

Volume

57

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