Reverse Brazil Nut Problem: Competition between Percolation and Condensation
نویسندگان
چکیده
منابع مشابه
Reverse Brazil nut problem: competition between percolation and condensation.
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 achieved. A theory is presented for the crossover from BNP to the reverse Brazil nut problem based on a competition between the percolation effect and the condensation of ...
متن کاملComment on "Reverse Brazil nut problem: competition between percolation and condensation".
In a recent paper [1] the Brazil nut problem (BNP), where particles with large diameters rise to the top when exposed to vertical shaking and the reverse Brasil nut problem (RBNP) where the large particles segregate to the bottom were investigated. In realistic situations these effects are driven or at least accompanied by global convection. Convection rolls are observed already in mono-dispers...
متن کاملReversing the Brazil-nut effect: competition between percolation and condensation.
We report on experiments on vertically shaken binary granular mixtures, which separate into their components due to the external excitation. This well-known phenomenon, where large particles rise to the top of the mixture, is called the Brazil-nut effect. Recent theoretical findings predict also a reverse Brazil-nut effect, where large particles sink to the bottom of the container. We choose sp...
متن کاملA horizontal Brazil-nut effect and its reverse.
Transport effects in a monolayer consisting of a binary granular mixture, confined in a horizontally vibrating circular dish, are studied experimentally and compared with a reduced theoretical model. Depending on the ratio of the particles' material density and size, migration of the larger particles occurs either towards the boundary or to the center of the circular container. These directed m...
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We study a competition model on Z where the two infections are driven by supercritical Bernoulli percolations with distinct parameters p and q. We prove that, for any q, there exist at most countably many values of p < min {q,− pc} such that coexistence can occur.
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2001
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.86.3423