化工进展2017，Vol.36Issue(2)：451-456,6.DOI:10.16085/j.issn.1000-6613.2017.02.007
多粒径颗粒在圆形偏心滚筒内的运动混合
Research on motion and mixing of polydisperse particles in a circular eccentric drum
摘要
Abstract
The discrete element method(DEM)was employed to simulate motion and mixing of polydisperse particles in a rotary drum. The effects of eccentricity on partition of particle system and its regional variation,change of large particle velocity and mixing degree of polydisperse particles were studied. Results showed that the rolling regime is divided three areas in the eccentric drum,particle system,the stagnant layer,the active layer and the vortex core. There is no actual vortex core,the shape and position of the "moving vortex core" are periodically changed with the rotation of the drum in the eccentric drum. In the center drum,the velocity of large particles in the stagnant layer is basically equal in different particle motion period. But in the eccentric drum,the two uniform velocity of the large particle in the two adjacent stagnant layer is unequal. The change of large particle velocity is more obvious with increasing eccentricity. The eccentricity has little effect on contact result of polydisperse particles. The variation of contact numbers of polydisperse particles is similar to that of the damping vibration curve in the mixing process.关键词
离散单元法/偏心滚筒/多粒径颗粒/移动涡心Key words
discrete element method/eccentric drum/polydisperse particles/moving vortex core分类
化学化工引用本文复制引用
张立栋,李连好,秦宏,王擎..多粒径颗粒在圆形偏心滚筒内的运动混合[J].化工进展,2017,36(2):451-456,6.基金项目
教育部长江学者和创新团队发展计划（IRT13052）、吉林省自然科学基金（20150101033JC）、吉林市科技计划（201464044）及吉教科合字2015-237资助项目。 （）
