A theoretical study of particle coalescence criteria for inelastic collisions of wet particles

Dongling Wu, Ping Zhou, Geoff Wang, Tony Howes, Wei Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


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.

Original languageEnglish
Article number116770
JournalChemical Engineering Science
Publication statusPublished - 2 Nov 2021
Externally publishedYes


  • Energy dissipation
  • Liquid bridge
  • Particle coalescence
  • Plastic deformation
  • Wet particle


Dive into the research topics of 'A theoretical study of particle coalescence criteria for inelastic collisions of wet particles'. Together they form a unique fingerprint.

Cite this