Lattice-Boltzmann simulation of particle suspensions in shear flow

J. Hyväluoma, P. Raiskinmäki, Antti Koponen, M. Kataja, J. Timonen

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)

Abstract

Inclusion of short-range particle–particle interactions for increased numerical stability in a lattice-Boltzmann code for particle-fluid suspensions, and handling of the particle phase for an effective implementation of the code for parallel computing, are discussed and formulated. In order to better understand the origin of the shear-thickening behavior observed in real suspensions, two simplified cases are considered with the code thus developed. A chain-like cluster of suspended particles is shown to increase the momentum transfer in a shear flow between channel walls, and thereby the effective viscosity of the suspension in comparison with random configurations of particles. A single suspended particle is also shown to increase the effective viscosity under shear flow of this simple suspension for particle Reynolds numbers above unity, due to inertial effects that change the flow configuration around the particle. These mechanisms are expected to carry over to large-scale particle-fluid suspensions.
Original languageEnglish
Pages (from-to)149-161
JournalJournal of Statistical Physics
Volume121
Issue number1-2
DOIs
Publication statusPublished - 2005
MoE publication typeA1 Journal article-refereed

Fingerprint

Lattice Boltzmann
Shear Flow
shear flow
Simulation
simulation
Viscosity
viscosity
Fluid
numerical stability
Configuration
fluids
Numerical Stability
Parallel Computing
configurations
momentum transfer
Reynolds number
unity
Momentum
Inclusion
inclusions

Keywords

  • Suspension
  • lattice Boltzmann
  • parallelization

Cite this

Hyväluoma, J. ; Raiskinmäki, P. ; Koponen, Antti ; Kataja, M. ; Timonen, J. / Lattice-Boltzmann simulation of particle suspensions in shear flow. In: Journal of Statistical Physics. 2005 ; Vol. 121, No. 1-2. pp. 149-161.
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Lattice-Boltzmann simulation of particle suspensions in shear flow. / Hyväluoma, J.; Raiskinmäki, P.; Koponen, Antti; Kataja, M.; Timonen, J.

In: Journal of Statistical Physics, Vol. 121, No. 1-2, 2005, p. 149-161.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Raiskinmäki, P.

AU - Koponen, Antti

AU - Kataja, M.

AU - Timonen, J.

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AB - Inclusion of short-range particle–particle interactions for increased numerical stability in a lattice-Boltzmann code for particle-fluid suspensions, and handling of the particle phase for an effective implementation of the code for parallel computing, are discussed and formulated. In order to better understand the origin of the shear-thickening behavior observed in real suspensions, two simplified cases are considered with the code thus developed. A chain-like cluster of suspended particles is shown to increase the momentum transfer in a shear flow between channel walls, and thereby the effective viscosity of the suspension in comparison with random configurations of particles. A single suspended particle is also shown to increase the effective viscosity under shear flow of this simple suspension for particle Reynolds numbers above unity, due to inertial effects that change the flow configuration around the particle. These mechanisms are expected to carry over to large-scale particle-fluid suspensions.

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