材料科学
鼓
粒子(生态学)
纵横比(航空)
粒径
混合(物理)
离散元法
流量(数学)
平面(几何)
机械
复合材料
几何学
物理
化学
机械工程
工程类
海洋学
数学
物理化学
量子力学
地质学
作者
Qiuhua Miao,Wancheng Zhu,Yudong Cao,Peng Huang,Chaobin Hu,Minping Jia
出处
期刊:Particuology
[Elsevier]
日期:2024-04-01
卷期号:87: 1-19
被引量:1
标识
DOI:10.1016/j.partic.2023.07.007
摘要
Particle mixing and segregation are common phenomena in rotary drums, which are challenging to be controlled and driven artificially in powder technology. In this work, the discrete element method (DEM) was applied to construct the novel rotary drum composed of different shaped curved sidewalls. By varying the operation parameters of particle and sidewall shapes as well as the length-to-diameter (L/D) ratio of drums, the axial mixing and segregation processes of binary size-induced particles were investigated. The results show that the axial flow velocity of the particle mixtures is noticeably weakened once the particle angularity increases, making the non-spherical particles to mix better in rotary drums compared to the spherical particles. Besides, in the short drums with size-induced spherical particles, the axial segregation characteristics are significantly enhanced by the convex sidewalls while suppressed by the concave sidewalls. However, for size-induced non-spherical particles, the axial segregation structure can be present in rotary drums with plane and concave sidewalls while not in drums with convex sidewalls. Moreover, the axial segregation band structure of spherical particles eventually increases proportionally with the increased drum L/D ratios. In contrast, the non-spherical particles cannot form obvious multi-proportional segregation bands.
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