Kink-Induced Transport and
Segregation in Oscillated Granular Layers
Abstract:
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). Counterrotating 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.
Phys. Rev. Lett. 91,
134301 (2003).
Manuscript available in PDF and PS formats.