Effect of cylinder wall parameters on the final packing density of mono-disperse spheres subject to three-dimensional vibrations Author links open overlay panel  

作　　者：Jack R.Grogan Andrei L.Nicuşan Christopher R.K.Windows-Yule 

机构地区：[1]School of Chemical Engineering,The University of Birmingham,Edgbaston,Birmingham,B152TT,UK

出　　处：《Particuology》2024年第8期211-225,共15页颗粒学报（英文版）

摘　　要：Achieving densely packed particles is desirable within the industries of ceramics,pharmaceuticals,defence and additive manufacturing.In this work,we use the discrete element method(DEM)to determine the effect of wall parameters on the final packing density of mono-disperse spheres subject to 4 varying three-dimensional vibration and fill conditions.We focus specifically on the impact of the container wall parameters on the particles'final packing density.Following on from the validation of the DEM simulation the particle-wall coefficient of restitution,the particle-wall coefficient of rolling friction and the particle-wall coefficient of sliding friction were varied individually and the effect on the final packing density analysed.For relatively low particle-particle friction glass beads,the effect of these wall properties had no discernible effect on the final packing density achieved.Following on from these findings the particle-wall properties were varied at the extreme values of particle-particle coefficient of rolling friction and particle-particle coefficient of sliding friction.For a particle-particle coefficient of sliding friction=1,increases in particle-wall coefficient of restitution resulted in a minor increase in the final packing density of particles though this was not statistically significant.For a particle-particle coefficient of sliding friction=1,increases in particle-wall coefficient of rolling friction resulted in a minor decrease in the final packing density of the particles though again not to a degree where the trend can,with complete certainty,be distinguished from the random error across the repeats.Finally,when the particle-particle coefficient of sliding friction=1,increases in particle-wall coefficient of sliding friction resulted in a significant decrease in the final packing density of particles.This decrease was attributed to the propagation of force chains throughout the packing.The significant decrease in final packing density with particle-wall coefficient of sliding friction h

关 键 词：Vibropacking Packing DENSIFICATION Vibration Discrete element method FRICTION Wall friction RESTITUTION 

分 类 号：TB53[理学—物理]