Oblique impact breakage unification of nonspherical particles using discrete element method

Di Peng, Li Ge Wang, Yuquan Lin, Chongqiang Zhu, Xizhong Chen, Zhihui Liu (Lead / Corresponding author), Ruihuan Ge (Lead / Corresponding author)

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Abstract

Particle breakage commonly occurs during processing of particulate materials, but a mechanistic model of particle impact breakage is not fully established. This article presents oblique impact breakage characteristics of nonspherical particles using discrete element method (DEM) simulations. Three different particle shapes, i.e. spherical, cuboidal and cylindrical, are investigated. Constituent spheres are agglomerated with bridging bonds to model the breakage characteristics under impact conditions. The effect of agglomerate shapes on the breakage pattern, damage ratio, and fragment size distribution is fully investigated. By using a newly proposed oblique impact model, unified breakage master surfaces are theoretically constructed for all the particle shapes under oblique impact conditions. The developed approach can be applied to modelling particulate processes where nonspherical particles and oblique impact breakage are prevailing.

Original languageEnglish
Pages (from-to)61-71
Number of pages11
JournalParticuology
Volume90
Early online date25 Nov 2023
DOIs
Publication statusE-pub ahead of print - 25 Nov 2023

Keywords

  • Bonded contact model
  • Breakage master curve
  • Discrete element method (DEM)
  • Equivalent velocity
  • Nonspherical particle
  • Oblique impact

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Materials Science

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