Journal
POWDER TECHNOLOGY
Volume 357, Issue -, Pages 232-239Publisher
ELSEVIER
DOI: 10.1016/j.powtec.2019.08.094
Keywords
Powder packing; Discrete element method; Flexible rod; Coordination number; Porosity; Radial distribution function
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Funding
- National Research Foundation of Korea (NRF) [NRF-2018R1A2B 2004207]
- MSIT (Ministry of Science, ICT), Korea, under the ITRC (Information Technology Research Center) support program [IITP-2018-2014-1-00639]
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In powder packing, it is essential to understand the packing structure of different powders. In this study, we numerically analyzed the packing structure of flexible rod particles using a discrete element method. We quantitatively evaluated the packing structure using the aspect ratio, flexibility, and surface energy of the flexible rod particles and determined the effects of these factors on the packing structure in terms of the radial distribution function, coordination number, and porosity. The flexible rod particles used for powder packing were simulated using a worm-like chain model, in which multiple spherical particles were connected in the form of a rod. The surface energy acting on the particles was represented using the Johnson-Kendall-Roberts model. The packing structure of the particles was quantitatively analyzed by filling a cylindrical container with the particles. The aforementioned factors affected the packing structure to different extents depending on the conditions. When the aspect ratio of the particles was high, the flexibility significantly affected the packing structure. However, when the aspect ratio of the particles was low, the effect of the surface energy was predominant. (C) 2019 Elsevier B.V. All rights reserved.
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