Granular segregation under vertical tapping

Details Granular segregation under vertical tapping Granular segregation under vertical tapping

2006-01-13

arxiv.org/abs/cond-mat/0601284v1

Physics

Condensed Matter

Soft Condensed Matter

Physical Review Letters, in press

Scientific paper

We present extensive Molecular Dynamics simulations on species segregation in a granular mixture subject to vertical taps. We discuss how grain properties, e.g., size, density, friction, as well as, shaking properties, e.g., amplitude and frequency, affect such a phenomenon. Both Brazil Nut Effect (larger particles on the top, BN) and the Reverse Brazil Nut Effect (larger particles on the bottom, RBN) are found and we derive the system comprehensive ``segregation diagram'' and the BN to RBN crossover line. We also discuss the role of friction and show that particles which differ only for their frictional properties segregate in states depending on the tapping acceleration and frequency.

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