Journal
ADVANCED POWDER TECHNOLOGY
Volume 32, Issue 10, Pages 3746-3759Publisher
ELSEVIER
DOI: 10.1016/j.apt.2021.08.024
Keywords
Jamming; Cylindrical particle flow; Particle size distribution; Friction; Discrete Element Method
Categories
Funding
- Fundamental Research Funds for Central Universities [2017ZY37]
- National Natu-ral Science Foundation of China [11872333,11272061, 91852205]
- Natural Science Foundation of Zhejiang Province [LR19A020001]
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This study examines the jamming phenomenon in shear flows of cylindrical particles with different size distributions and found that at the jamming volume fraction, stress fluctuation and granular temperature reach their maximum values, while the alignment degree of cylindrical particles reaches a minimum.
In this work, frictional, cylindrical particle shear flows with different size distributions (monodisperse, binary, Gaussian, uniform) are simulated using the Discrete Element Method (DEM). The influences of particle size distribution and interparticle friction coefficient on the solid phase stresses, bulk friction coefficient, and jamming transition are investigated. In frictional dense flows, shear stresses rise rapidly with the increasing solid volume fraction when jamming occurs. The results suggest that at the jamming volume fraction, stress fluctuation and granular temperature achieve the maximum values, and the rate of the stress increase with increasing solid volume fraction approaches the peak value. Meanwhile, the degree of cylindrical particle alignment approaches a valley value. In the polydisperse flows, the jamming volume fraction exhibits significant dependences on the fraction of the longer particles and the particle size distribution. Two models considering the effect of particle size distribution are discussed for predicting the jamming volume fractions of polydisperse flows with frictional, cylindrical particles. (c) 2021 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
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