Reverse Brazil nut problem: Competition between percolation and condensation
Reverse Brazil nut problem: Competition between percolation and condensation
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DOI：
10.1103/physrevlett.86.3423
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发表时间：
2001-04-09
影响因子：
8.6
通讯作者：
Luding, S
中科院分区：
文献类型：
--
作者：
Hong, DC;Quinn, PV;Luding, S
在巴西坚果问题（BNP）中，直径较大的硬球会上升到顶部。有各种各样的解释（渗透，重组，对流），但对这种效应的广泛理解或控制绝不是实现的。基于渗流效应和硬球凝聚之间的竞争，提出了从BNP到反向巴西坚果问题的交叉理论。交叉条件的确定，和理论预测进行比较，在二维和三维的分子动力学模拟。
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 hard spheres. The crossover condition is determined, and theoretical predictions are compared to molecular dynamics simulations in two and three dimensions.