Numerical study of the wall effect on particle sedimentation

Liang Hsia Tsai, Chien Cheng Chang, Tsorng Whay Pan*, Roland GLOWINSKI

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

10 Citations (Scopus)


In this article, we investigate the abnormal settling of two-disk systems and elliptical shaped particles in infinite two-dimensional channels filled with an incompressible viscous fluid. We apply a distributed Lagrange multiplier/fictitious domain method (DLM/FDM) for the direct numerical simulation of these particulate flows. Due to the wall effect, the two-disk systems can form chains which settle stably instead of having the particles moving apart. Also, sedimentation with the long axis moving to vertical positions in the middle of the infinite channel has been observed for the elliptic shaped particles. The critical Reynolds number for having such an abnormal settling behaviour decreases as the width of the channel increases.

Original languageEnglish
Pages (from-to)158-166
Number of pages9
JournalInternational Journal of Computational Fluid Dynamics
Issue number2-3
Publication statusPublished - 16 Mar 2018

Scopus Subject Areas

  • Computational Mechanics
  • Aerospace Engineering
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Mechanics of Materials
  • Mechanical Engineering

User-Defined Keywords

  • chain of disks
  • critical Reynolds number
  • dual-particle settling
  • long body settling
  • low Reynolds number
  • Wall effect


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