Particle-resolved simulations of liquid fluidization of rigid and flexible fibers

J.J. Derksen* (Corresponding Author)

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)
1 Downloads (Pure)


Particle-resolved, three-dimensional, time-dependent simulations of rigid and flexible cylinders fluidized by a liquid flow in fully periodic domains have been performed by means of the lattice-Boltzmann method supplemented with immersed boundaries. The solids volume fraction ranges from 0.10 to 0.48 and the length-over-diameter aspect ratio of the cylinders from 4 to 12. The bending stiffness of the cylinders is the third major input parameter. The resulting Reynolds numbers based on the average slip velocity of the cylinders and their equivalent diameter range from 6 to 70. It is shown that increasing the flexibility—that is, decreasing the bending stiffness—reduces the Reynolds number, an effect that is most pronounced for low solids volume fractions and long cylinders. As for rigid cylinders, the distribution of the orientation relative to the direction of gravity of the flexible cylinders is a pronounced function of the solids volume fraction and the aspect ratio. Flexibility tends to somewhat randomize the orientation distribution, which could explain the effect of flexibility on the slip velocity and thus the Reynolds number.
Original languageEnglish
Pages (from-to)5193–5203
Number of pages11
JournalActa Mechanica
Early online date20 Oct 2020
Publication statusPublished - 1 Dec 2020


  • Fluidization
  • particle-resolved simulation
  • non-spherical particles
  • flexible fibers
  • lattice-Boltzmann method


Dive into the research topics of 'Particle-resolved simulations of liquid fluidization of rigid and flexible fibers'. Together they form a unique fingerprint.

Cite this