The European Physical Journal E ( IF 1.8 ) Pub Date : 2021-06-27 , DOI: 10.1140/epje/s10189-021-00091-0 Thanh-Trung Vo 1 , Thi Lo Vu 2, 3 , Patrick Mutabaruka 4
Abstract
To get insight into the segregation process of a polydisperse granular materials flow, we numerically investigated the migration process of particles in a rotating drum operating in the rolling regime by means of the discrete element method. Particle migration is analyzed through the variation of the proportion of particles in different zones where the flow property is characterized. The proportion of particles in different zones of the drum shows to increase in the center of the flow radially and axially where a higher concentration of small particles is observed, while its decreases in other zones with a higher concentration of larger particles. Interestingly, we find that the migration process of particles leads to radial and axial segregation which is caused by a combination between the exerted fluctuation forces on particles and its surrounding pressure gradient.
Graphic abstract
中文翻译:
粒径多分散性对转鼓中球形颗粒分离的影响
摘要
为了深入了解多分散颗粒材料流的分离过程,我们通过离散元方法数值研究了在滚动状态下运行的转鼓中颗粒的迁移过程。通过表征流动特性的不同区域中颗粒比例的变化来分析颗粒迁移。转鼓不同区域的颗粒比例在径向和轴向流动中心增加,其中观察到较高浓度的小颗粒,而在其他较大颗粒浓度较高的区域降低。有趣的是,