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Segregation in fluidized versus tapped packs | | Marco Tarzia
; Annalisa Fierro
; Mario Nicodemi
; Antonio Coniglio
; | | Date: |
22 Sep 2004 | | Journal: | Phys. Rev. Lett. 93, 198002 (2004) | | Subject: | Statistical Mechanics | cond-mat.stat-mech | | Abstract: | We compare the predictions of two different statistical mechanics approaches, corresponding to different physical measurements, proposed to describe binary granular mixtures subjected to some external driving (continuous shaking or tap dynamics). In particular we analytically solve at a mean field level the partition function of a simple hard sphere lattice model under gravity and we focus on the phenomenon of size segregation. We find that the two approaches lead to similar results and seem to coincide in the limit of very low shaking amplitude. However they give different predictions of the crossovers from Brazil nut effect to reverse Brazil nut effect with respect to the shaking amplitude, which could be detected experimentally. | | Source: | arXiv, cond-mat/0409574 | | Other source: | [GID 1047624] pmid15600882 | | Services: | Forum | Review | PDF | Favorites | |
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