https://doi.org/10.1051/epjconf/202124907002
Effect of particle shape on particle breakage inside rotating cylinders
1
CNRS, LMGC, University of Montpellier, 163 rue Auguste Broussonnet, F-34095 Montpellier, France
2
IATE, INRA, CIRAD, Montpellier SupAgro, University of Montpellier, France
3
CEA, DES, IRESNE, DEC, SA3E, LCU, Cadarache F-13108 Saint-Paul-Lez-Durance, France
* e-mail: franck.radjai@umontpellier.fr
Published online: 7 June 2021
We study the influence of particle shape on the evolution of particle breakage process taking place inside rotating cylinders. Extensive particle dynamics simulations taking into account the dynamics of the granular flow, particle breakage, and polygonal particle shapes were carried out. We find that the rate of particle breakage is faster in samples composed of initially rounder particles. The analysis of the active flowing layer thickness suggests that for samples composed of rounder particles a relatively lower dilatancy and higher connectivity lead to a less curved free surface profile. As a result, rounder particles rolling down the free surface have a higher mobility and thus higher velocities. In consequence, the faster breakage observed for rounder initial particles is due to the larger particles kinetic energy at the toe of the flow.
A video is available at https://doi.org/10.48448/h1ht-g784
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
