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Simulation of the granular flow of cylindrical particles in the rotating drum
Author(s) -
Yang Shiliang,
Sun Yuhao,
Chew Jia Wei
Publication year - 2018
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.16342
Subject(s) - drum , mechanics , discrete element method , perpendicular , aspect ratio (aeronautics) , particle (ecology) , flow (mathematics) , residence time (fluid dynamics) , granular material , materials science , orientation (vector space) , particle size , physics , geometry , engineering , mechanical engineering , composite material , mathematics , geology , geotechnical engineering , oceanography , chemical engineering
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. © 2018 American Institute of Chemical Engineers AIChE J , 64: 3835–3848, 2018