Dense suspensions: solid-liquid interactions at the particle scale

J. J. Derksen*

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Flows of solid-liquid suspensions span a multi-dimensional parameter space, with coordinates such as the Stokes number, the solids volume fraction, the density ratio, and Reynolds numbers. We are interested in systems with appreciable inertia effects - i.e., non-zero Stokes and Reynolds numbers - having density ratios of the order of one (typical for solid-liquid systems) and solids volume fractions of at least 0.1. Additional effects include strongly inhomogeneous solids distributions, non-Newtonian liquids, and sticky particles that tend to aggregate. This leads to a rich spectrum of interactions at the scale of individual particles. To reveal these we perform direct simulations of collections of a few thousand of particles carried by a liquid flow with resolution of the solid-liquid interfaces. For this we use the lattice-Boltzmann method supplemented with an immersed boundary approach.

Original languageEnglish
Pages (from-to)103-111
Number of pages9
JournalProgress in computational fluid dynamics
Volume12
Issue number2-3
DOIs
Publication statusPublished - 22 Jun 2012

Keywords

  • multiphase flow
  • suspensions
  • direct numerical simulation
  • LBM
  • lattice-Boltzmann method
  • immersed boundary method
  • mesoscopic modelling
  • particle-turbulence interaction
  • aggregation
  • collision modelling
  • Lattice-Boltzmann simulations
  • homogeneous turbulence
  • numerical simulations
  • isotropic turbulence
  • flow
  • equation
  • breakage
  • dynamics
  • fluids

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