Comparative discrete element modelling of a vibratory sieving process with spherical and rounded polyhedron particles
Comparative discrete element modelling of a vibratory sieving process with spherical and rounded polyhedron particles
复制标题
DOI：
10.1007/s10035-017-0749-y
复制
发表时间：
2017-10
期刊：
影响因子：
2.4
通讯作者：
Wei Chen;T. Donohue;A. Katterfeld;K. Williams
中科院分区：
文献类型：
--
作者：
Wei Chen;T. Donohue;A. Katterfeld;K. Williams
目前离散元模型（DEM）中使用的球形颗粒不能准确反映某些特定工业应用中的颗粒形状效应。本研究专门研究了振动筛分过程的离散元建模中颗粒形状的影响，重点是比较球形和非球形建模方法的结果。铁矿石材料的粒度分布最初是通过振动筛分试验通过实验获得的。一个相同的过程被复制在DEM与球体和非球形颗粒，并随后对实验结果进行了比较，得到的粒度分布。基于2D颗粒形状表征过程，使用圆形多面体形状来校准和生成非球形颗粒。模拟结果表明，圆角多面体的方法是能够准确地反映颗粒筛接触，没有过多的滚动阻力调整，这是所需的球体。
Current spherical particle usage in discrete element modelling (DEM) is not able to accurately reflect the particle shape effect in some specific industrial applications. This study specifically investigated the effect of particle shape in discrete element modelling of a vibratory sieving process, with the focus on comparing results from spherical and non-spherical modelling methods. The particle size distribution of an iron ore material was initially obtained experimentally through vibratory sieving tests. An identical process was replicated in DEM with both spheres and non-spherical particles, and resulting particle size distributions were subsequently compared against the experimental results. A rounded polyhedron shape was utilised to calibrate and generate non-spherical particles based on a 2D particle shape characterisation process. Modelling results suggested that the rounded polyhedron method was able to accurately reflect the particle-sieve contacts without excessive rolling resistance tuning, which was required by the spheres.