期刊
POWDER TECHNOLOGY
卷 380, 期 -, 页码 47-58出版社
ELSEVIER
DOI: 10.1016/j.powtec.2020.11.036
关键词
Granular materials; Self-assembly; Particle packing; Discrete element method; Vibration
资金
- Australian Research Council [IH140100035]
- JITRI (Jiangsu Industrial Technology Research Institute)
- Western Sydney University
- Australian Research Council [IH140100035] Funding Source: Australian Research Council
This paper presents a numerical study on the self-assembly of mono-size granular spheres under uniform and non-uniform 3D vibration. The results show that under 1D or uniform 3D vibration, self-assembly results in a RHCP structure, while under certain non-uniform vibration, a packing can self-assemble into FCC or HCP crystal structure. The microscopical analyses provide rich insight into the different self-assembly processes under different vibration modes.
This paper presents a numerical study on the self-assembly of mono-size granular spheres with periodic boundary conditions under uniform and non-uniform 3D vibration. For uniform 3D vibration, the vibration conditions for self-assembly are similar to those under 1D vertical vibration. For non-uniform 3D vibration, slight horizontal vibration added to 1D vertical vibration can significantly promote or depress self-assembly. Moreover, under 1D or uniform 3D vibration, self-assembly results in a RHCP (random hexagonal close packed) structure, while under certain non-uniform vibration, a packing can self-assemble into a nearly pure FCC (face centered cubic) or HCP (hexagonal close packed) crystal structure. The microscopical analyses on the local structures, dynamics and forces provide rich insight into the different self-assembly processes under different vibration modes. These results can help understand the self-assembly of granular materials under vibration and guide how to control the structure of packed beds. (C) 2020 Elsevier B.V. All rights reserved.
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