TY - JOUR
T1 - A theoretical study of particle coalescence criteria for inelastic collisions of wet particles
AU - Wu, Dongling
AU - Zhou, Ping
AU - Wang, Geoff
AU - Howes, Tony
AU - Chen, Wei
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/11/2
Y1 - 2021/11/2
N2 - Individual wet particle collisions can significantly affect the macroscale behaviors of granular flow systems. The collision process between two wet particles consists of deformation and non-deformation stages. In each stage, a force model is required to describe the interactive mechanics. Forces vary in a fashion that the energy dissipates during the entire collision process, which further impacts the particle coalescence. In this study, the force model and energy dissipation mechanism at each collision stage are investigated. For the deformation stage, combined effects of adhesion and plastic deformation at the contact surface are considered. For the non-deformation stage, combined effects of capillary and viscous force are studied. Based on energy conservation, the particle coalescence criterion is characterized into three distinct types. The developed explicit expression for the contact force, restitution coefficient, and corresponding coalescence criteria can be further applied in modelling of wet granular flow systems.
AB - Individual wet particle collisions can significantly affect the macroscale behaviors of granular flow systems. The collision process between two wet particles consists of deformation and non-deformation stages. In each stage, a force model is required to describe the interactive mechanics. Forces vary in a fashion that the energy dissipates during the entire collision process, which further impacts the particle coalescence. In this study, the force model and energy dissipation mechanism at each collision stage are investigated. For the deformation stage, combined effects of adhesion and plastic deformation at the contact surface are considered. For the non-deformation stage, combined effects of capillary and viscous force are studied. Based on energy conservation, the particle coalescence criterion is characterized into three distinct types. The developed explicit expression for the contact force, restitution coefficient, and corresponding coalescence criteria can be further applied in modelling of wet granular flow systems.
KW - Energy dissipation
KW - Liquid bridge
KW - Particle coalescence
KW - Plastic deformation
KW - Wet particle
UR - http://www.scopus.com/inward/record.url?scp=85106414325&partnerID=8YFLogxK
U2 - 10.1016/j.ces.2021.116770
DO - 10.1016/j.ces.2021.116770
M3 - Article
AN - SCOPUS:85106414325
SN - 0009-2509
VL - 243
JO - Chemical Engineering Science
JF - Chemical Engineering Science
M1 - 116770
ER -