This study aims at unveiling the effect of particle shape on granular flow behavior. Discrete element method is used to simulate cylindrical particles with different aspect ratios in the rotating drum operating in the rolling regime. The results demonstrate that the cylindrical particles exhibit similar general flow patterns as the spherical particles. As the aspect ratio of the cylindrical particles increases, the active‐passive interfaces become steeper, and the number fraction, solid residence time, and collision force in the active region decreases. The mechanism underlying the difference is the preferential orientation, with particles of greater aspect ratios increasingly orientating their longitudinal axes perpendicular to the drum length. Also, particle alignment in the active region is more uniform than that in the passive region. The results obtained in this work provide new insights regarding the impact of particle shape on granular flow in the rotating drum. © 2018 American Institute of Chemical Engineers AIChE J, 64: 3835–3848, 2018

中文翻译：

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旋转鼓中圆柱状颗粒的颗粒流动模拟

这项研究旨在揭示颗粒形状对颗粒流动行为的影响。离散元素方法用于模拟在滚动状态下运行的转鼓中具有不同长宽比的圆柱形颗粒。结果表明，圆柱形颗粒表现出与球形颗粒相似的一般流动模式。随着圆柱状颗粒的长宽比增加，主动-被动界面变得更陡峭，并且主动区域中的数量分数，固体停留时间和碰撞力减小。造成这种差异的机制是优先定向，长径比较大的颗粒将其纵向轴越来越垂直于滚筒长度。而且，在有源区域中的粒子排列比在无源区域中的粒子排列更均匀。在这项工作中获得的结果提供了有关颗粒形状对旋转鼓中颗粒流的影响的新见解。©2018美国化学工程师学会AIChE J，64：3835–3848，2018