Segregation by friction

Document Type

Article

Publication Date

3-1-2003

Abstract

Granular materials are known to separate by size under a variety of circumstances. Experiments presented here and elucidated by modeling and MD simulation document a new segregation mechanism, namely segregation by friction. The experiments are carried out by placing steel spheres on a horizontal plane enclosed by rectangular sidewalls, and subjecting them to horizontal shaking. Half the spheres are highly smooth; the remainder are identical to the first half, except that their surfaces have been roughened by chemical etching, giving them higher coefficients of friction. Segregation due to this difference in friction occurs, particularly when the grains have a relatively long mean free path. In the presence of an appropriately chosen small "hill" in the middle of the container, the grains can be made to completely segregate by friction type.

Identifier

0037343787 (Scopus)

Publication Title

Europhysics Letters

External Full Text Location

https://doi.org/10.1209/epl/i2003-00291-y

ISSN

02955075

First Page

742

Last Page

748

Issue

6

Volume

61

Grant

0137119

Fund Ref

National Science Foundation

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