The Reverse Brazil Nut Problem: Competition between Percolation and Condensation

Details The Reverse Brazil Nut Problem: Competition between Percolation and Condensation The Reverse Brazil Nut Problem: Competition between Percolation and Condensation

2000-10-27

arxiv.org/abs/cond-mat/0010459v1

Physics

Condensed Matter

Materials Science

9 pages which includes 7 figures

Scientific paper

10.1103/PhysRevLett.86.3423

In the Brazil nut problem (BNP), hard spheres with larger diameters rise to the top. There are various explanations (percolation, reorganization, convection), but a broad understanding or control of this effect is by no means acheived. A theory is presented for the crossover from the BNP to the reverse Brazil nut problem (RBNP) based on a competition between the percolation effect and the condensation of hard spheres. The crossover condition is determined, and the theoretical predictions are compared to Molecular Dynamics simulations in two and three dimensions.

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