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Phase bubbles and spatiotemporal chaos in granular patterns
(Georgia Institute of Technology, 2001-12-04)
We use inelastic hard sphere molecular dynamics simulations and laboratory experiments to study patterns in vertically oscillated granular layers. The simulations and experiments reveal that phase bubbles spontaneously ...
Kink-induced transport and segregation in oscillated granular layers
(Georgia Institute of Technology, 2003-09-26)
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 ...
Lattice dynamics and melting of a nonequilibrium pattern
(Georgia Institute of Technology, 2003-03-14)
We present a new description of nonequilibrium square patterns as a harmonically coupled crystal lattice. In a vertically oscillating granular layer, different transverse normal modes of the granular square-lattice pattern ...