Direct numerical simulations of aggregation of monosized spherical particles in homogeneous isotropic turbulence

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Direct numerical simulations of turbulent solidliquid suspensions have been performed. The liquid is Newtonian, and the particles are identical spheres. The spheres have a tendency to aggregate since they are attracted to one another as a result of a square-well potential. The size of the particles is typically larger than the Kolmogorov scale, albeit of the same order of magnitude. In such situations, the particle dynamics (including the aggregation process), and turbulence strongly interact which explains the need for direct simulations. The lattice-Boltzmann method combined with an immersed boundary method for representing the no-slip conditions at the spherical solidliquid interfaces was used. The results show that the aggregate size distributions depend on both the strength of particleparticle interactions and the intensity of the turbulence. (C) 2011 American Institute of Chemical Engineers AIChE J, 58: 25892600, 2012

Original languageEnglish
Pages (from-to)2589-2600
Number of pages12
JournalAIChE Journal
Volume58
Issue number8
Early online date21 Oct 2011
DOIs
Publication statusPublished - Aug 2012

Keywords

  • solid-liquid flow
  • turbulence
  • aggregation
  • lattice-Boltzmann method
  • square-well potential
  • LIQUID-FLUIDIZED BEDS
  • BOLTZMANN-EQUATION
  • QUADRATURE METHOD
  • FLOW
  • BREAKAGE
  • SUSPENSIONS
  • SPHERES
  • SIZE
  • DYNAMICS
  • MOMENTS

Cite this

Direct numerical simulations of aggregation of monosized spherical particles in homogeneous isotropic turbulence. / Derksen, J. J.

In: AIChE Journal, Vol. 58, No. 8, 08.2012, p. 2589-2600.

Research output: Contribution to journalArticle

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abstract = "Direct numerical simulations of turbulent solidliquid suspensions have been performed. The liquid is Newtonian, and the particles are identical spheres. The spheres have a tendency to aggregate since they are attracted to one another as a result of a square-well potential. The size of the particles is typically larger than the Kolmogorov scale, albeit of the same order of magnitude. In such situations, the particle dynamics (including the aggregation process), and turbulence strongly interact which explains the need for direct simulations. The lattice-Boltzmann method combined with an immersed boundary method for representing the no-slip conditions at the spherical solidliquid interfaces was used. The results show that the aggregate size distributions depend on both the strength of particleparticle interactions and the intensity of the turbulence. (C) 2011 American Institute of Chemical Engineers AIChE J, 58: 25892600, 2012",
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KW - SPHERES

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