A coarse grained model for viscoelastic solids in discrete multiphysics simulations

Iwan H. Sahputra*, Alessio Alexiadis, Michael J. Adams

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Viscoelastic bonds intended for Discrete Multiphysics (DMP) models are developed to allow the study of viscoelastic particles with arbitrary shape and mechanical inhomogeneity that are relevant to the pharmaceutical sector and that have not been addressed by the Discrete Element Method (DEM). The model is applied to encapsulate particles with a soft outer shell due, for example, to the partial ingress of moisture. This was validated by the simulation of spherical homogeneous linear elastic and viscoelastic particles. The method is based on forming a particle from an assembly of beads connected by springs or springs and dashpots that allow the sub-surface stress fields to be computed, and hence an accurate description of the gross deformation. It is computationally more expensive than DEM, but could be used to define more effective interaction laws.

Original languageEnglish
Article number30
Pages (from-to)1-15
Number of pages15
Issue number2
Publication statusPublished - Jun 2020


  • Coarse grained model
  • Inhomogeneous particles
  • Kelvin–Voigt viscoelastic bonds
  • Particle method
  • Viscoelastic particles

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Engineering
  • General Energy


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