Kink-induced transport and segregation in oscillated granular layers

Details Kink-induced transport and segregation in oscillated granular layers Kink-induced transport and segregation in oscillated granular layers

2003-08-19

arxiv.org/abs/cond-mat/0308378v1

Phys. Rev. Lett. 91, 134301 (2003); also see Phys. News Update http://www.aip.org/enews/physnews/2003/split/653-3.html

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 5 figures. to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.91.134301

We use experiments and molecular dynamics simulations of vertically oscillated granular layers to study horizontal particle segregation induced by a kink (a boundary between domains oscillating out of phase). Counter-rotating convection rolls carry the larger particles in a bidisperse layer along the granular surface to a kink, where they become trapped. The convection originates from avalanches that occur inside the layer, along the interface between solidified and fluidized grains. The position of a kink can be controlled by modulation of the container frequency, making possible systematic harvesting of the larger particles.

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