Simulations of dense agitated solid-liquid suspensions: effects of the distribution of particle sizes

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Abstract

We perform Eulerian-Lagrangian simulations of solid-liquid flow in a mixing tank. The simulations are three-dimensional and time dependent and in the transitional flow regime. The lattice-Boltzmann method is used to solve the volume-averaged Navier-Stokes equations. The overall solids volume fraction is of the order of 10%. Situations with the solids only partly suspended are compared to those with fully suspended solids. The emphasis is on the effect of the particle size distribution (PSD) on the suspension behavior. Four PSD’s all having the same d32 were investigated. It is harder to fully suspend particles with wider size distribution as compared to narrow distributions.
Original languageEnglish
Pages (from-to)56-64
Number of pages9
JournalChemical Engineering Science
Volume189
Early online date26 May 2018
DOIs
Publication statusPublished - 2 Nov 2018

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Suspensions
Particle size
Liquids
Particle size analysis
Navier Stokes equations
Volume fraction

Keywords

  • solid-liquid suspension
  • lattice-Boltzmann method
  • discrete particle method
  • particle size distribution
  • two-way coupling
  • agitated suspensions

Cite this

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title = "Simulations of dense agitated solid-liquid suspensions: effects of the distribution of particle sizes",
abstract = "We perform Eulerian-Lagrangian simulations of solid-liquid flow in a mixing tank. The simulations are three-dimensional and time dependent and in the transitional flow regime. The lattice-Boltzmann method is used to solve the volume-averaged Navier-Stokes equations. The overall solids volume fraction is of the order of 10{\%}. Situations with the solids only partly suspended are compared to those with fully suspended solids. The emphasis is on the effect of the particle size distribution (PSD) on the suspension behavior. Four PSD’s all having the same d32 were investigated. It is harder to fully suspend particles with wider size distribution as compared to narrow distributions.",
keywords = "solid-liquid suspension, lattice-Boltzmann method, discrete particle method, particle size distribution, two-way coupling, agitated suspensions",
author = "Derksen, {J. J.}",
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PY - 2018/11/2

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N2 - We perform Eulerian-Lagrangian simulations of solid-liquid flow in a mixing tank. The simulations are three-dimensional and time dependent and in the transitional flow regime. The lattice-Boltzmann method is used to solve the volume-averaged Navier-Stokes equations. The overall solids volume fraction is of the order of 10%. Situations with the solids only partly suspended are compared to those with fully suspended solids. The emphasis is on the effect of the particle size distribution (PSD) on the suspension behavior. Four PSD’s all having the same d32 were investigated. It is harder to fully suspend particles with wider size distribution as compared to narrow distributions.

AB - We perform Eulerian-Lagrangian simulations of solid-liquid flow in a mixing tank. The simulations are three-dimensional and time dependent and in the transitional flow regime. The lattice-Boltzmann method is used to solve the volume-averaged Navier-Stokes equations. The overall solids volume fraction is of the order of 10%. Situations with the solids only partly suspended are compared to those with fully suspended solids. The emphasis is on the effect of the particle size distribution (PSD) on the suspension behavior. Four PSD’s all having the same d32 were investigated. It is harder to fully suspend particles with wider size distribution as compared to narrow distributions.

KW - solid-liquid suspension

KW - lattice-Boltzmann method

KW - discrete particle method

KW - particle size distribution

KW - two-way coupling

KW - agitated suspensions

U2 - 10.1016/j.ces.2018.05.053

DO - 10.1016/j.ces.2018.05.053

M3 - Article

VL - 189

SP - 56

EP - 64

JO - Chemical Engineering Science

JF - Chemical Engineering Science

SN - 0009-2509

ER -