Influence of friction on granular segregation.

@article{Ulrich2007InfluenceOF,
  title={Influence of friction on granular segregation.},
  author={S. Ulrich and M. Schr{\"o}ter and H. Swinney},
  journal={Physical review. E, Statistical, nonlinear, and soft matter physics},
  year={2007},
  volume={76 4 Pt 1},
  pages={
          042301
        }
}
Vertical shaking of a mixture of small and large beads can lead to segregation where the large beads either accumulate at the top of the sample, the so-called Brazil nut effect (BNE), or at the bottom, the reverse Brazil nut effect (RBNE). Here we demonstrate experimentally a sharp transition from the RBNE to the BNE when the particle coefficient of friction increases due to aging of the particles. This result can be explained by the two competing mechanisms of buoyancy and sidewall-driven… Expand
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