期刊
AICHE JOURNAL
卷 64, 期 11, 页码 3835-3848出版社
WILEY
DOI: 10.1002/aic.16342
关键词
rotating drum; particle sphericity; superquadric particles; discrete element method; numerical simulation
资金
- National Research Foundation (NRF), Prime Minister's Office, Singapore under its Campus for Research Excellence and Technological Enterprise (CREATE) program
- 2nd Intra-CREATE Seed Collaboration Grant [NRF2017-ITS002-013]
This study aims at unveiling the effect of particle shape on granular flow behavior. Discrete element method is used to simulate cylindrical particles with different aspect ratios in the rotating drum operating in the rolling regime. The results demonstrate that the cylindrical particles exhibit similar general flow patterns as the spherical particles. As the aspect ratio of the cylindrical particles increases, the active-passive interfaces become steeper, and the number fraction, solid residence time, and collision force in the active region decreases. The mechanism underlying the difference is the preferential orientation, with particles of greater aspect ratios increasingly orientating their longitudinal axes perpendicular to the drum length. Also, particle alignment in the active region is more uniform than that in the passive region. The results obtained in this work provide new insights regarding the impact of particle shape on granular flow in the rotating drum. (C) 2018 American Institute of Chemical Engineers
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