Simulational studies of axial granular segregation in a rotating cylinder.
Simulational studies of axial granular segregation in a rotating cylinder.
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DOI：
10.1103/physreve.65.061306
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发表时间：
2002-02
期刊：
影响因子：
--
通讯作者：
D. Rapaport
中科院分区：
文献类型：
--
作者：
D. Rapaport
用离散颗粒模拟方法研究了两种不同颗粒混合填充的水平旋转圆筒内的轴向偏析。在适当的条件下，发现偏析发生，颗粒分离成一系列垂直于轴的条带。在某些情况下，能带结构表现出与时间相关的行为，包括能带形成、合并和沿轴运动，所有这些都与实验中出现的现象相对应。为了检验指定问题的许多参数如何影响分离过程，使用各种参数设置进行了模拟运行，包括实验无法实现的摩擦系数组合。分离和分离（混合）都进行了研究，并使用带有明确端盖和周期性端盖的圆柱体来帮助分离分离的原因。
Discrete particle simulation methods have been used to study axial segregation in a horizontal rotating cylinder that is partially filled with a mixture of two different kinds of granular particles. Under suitable conditions segregation was found to occur, with the particles separating into a series of bands perpendicular to the axis. In certain cases the band structure exhibited time-dependent behavior, including band formation, merging and motion along the axis, all corresponding to phenomena that arise experimentally. In order to examine how the many parameters specifying the problem affect the segregation process, simulation runs were carried out using a variety of parameter settings, including combinations of friction coefficients not realizable experimentally. Both segregation and desegregation (mixing) were investigated, and cylinders with both explicit end caps and periodic ends were used to help isolate the causes of segregation.