Hydrodynamic forces on monodisperse assemblies of axisymmetric elongated particles: Orientation and voidage effects

Sathish K.P. Sanjeevi, Johan T. Padding*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)
22 Downloads (Pure)

Abstract

We investigate the average drag, lift, and torque on static assemblies of capsule-like particles of aspect ratio 4. The performed simulations are from Stokes flow to high Reynolds numbers (0.1 ≤ Re ≤ 1,000) at different solids volume fraction (0.1 ≤ ɛs ≤ 0.5). Individual particle forces as a function of the incident angle ϕ with respect to the average flow are scattered. However, the average particle force as a function of ϕ is found to be independent of mutual particle orientations for all but the highest volume fractions. On average, a sine-squared scaling of drag and sine-cosine scaling of lift holds for static multiparticle systems of elongated particles. For a packed bed, our findings can be utilized to compute the pressure drop with knowledge of the particle-orientation distribution, and the average particle drag at ϕ = 0° and 90°. We propose closures for average forces to be used in Euler–Lagrange simulations of particles of aspect ratio 4.

Original languageEnglish
Article numbere16951
Number of pages20
JournalAIChE Journal
Volume66
Issue number6
DOIs
Publication statusPublished - 2020

Keywords

  • drag, lift, and torque correlations
  • nonspherical particles
  • particle assemblies

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