Lattice-Boltzmann simulation of fluid flow through packed beds of uniform ellipsoids

L. W. Rong, Z. Y. Zhou, A. B. Yu

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Fluid flow through packed beds of uniform ellipsoids is studied by a parallel lattice-Boltzmann (LB) model. The packed beds are generated by means of discrete element method and have a wide range of particle sphericity. First, the LB model is used to validate the drag force coefficient of a single ellipsoid. The validated model is then extended to study the effects of sphericity and porosity on the fluid flow and quantify the drag force on particles in packed beds. Some unique flow structures are identified in relation to tortuous pore structures. Due to non-uniform structure and flow, the fluid-particle interaction forces vary giving a distribution. The results suggest that the mean drag forces on oblate particles are more sensitive to aspect ratio and hence sphericity than prolate ones. Based on the simulated data, a new equation is proposed to calculate the mean drag force on particles. The results show that the new equation is more accurate than the correlations in the literature.
Original languageEnglish
Pages (from-to)146 - 156
Number of pages11
JournalPowder Technology
Volume285
DOIs
Publication statusPublished - 2015

Keywords

  • Packed bed
  • Porous media
  • Lattice–Boltzmann simulation
  • Fluid mechanics
  • Drag force
  • Particle-fluid flow

Cite this

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title = "Lattice-Boltzmann simulation of fluid flow through packed beds of uniform ellipsoids",
abstract = "Fluid flow through packed beds of uniform ellipsoids is studied by a parallel lattice-Boltzmann (LB) model. The packed beds are generated by means of discrete element method and have a wide range of particle sphericity. First, the LB model is used to validate the drag force coefficient of a single ellipsoid. The validated model is then extended to study the effects of sphericity and porosity on the fluid flow and quantify the drag force on particles in packed beds. Some unique flow structures are identified in relation to tortuous pore structures. Due to non-uniform structure and flow, the fluid-particle interaction forces vary giving a distribution. The results suggest that the mean drag forces on oblate particles are more sensitive to aspect ratio and hence sphericity than prolate ones. Based on the simulated data, a new equation is proposed to calculate the mean drag force on particles. The results show that the new equation is more accurate than the correlations in the literature.",
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author = "Rong, {L. W.} and Zhou, {Z. Y.} and Yu, {A. B.}",
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Lattice-Boltzmann simulation of fluid flow through packed beds of uniform ellipsoids. / Rong, L. W.; Zhou, Z. Y.; Yu, A. B.

In: Powder Technology, Vol. 285, 2015, p. 146 - 156.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Lattice-Boltzmann simulation of fluid flow through packed beds of uniform ellipsoids

AU - Rong, L. W.

AU - Zhou, Z. Y.

AU - Yu, A. B.

PY - 2015

Y1 - 2015

N2 - Fluid flow through packed beds of uniform ellipsoids is studied by a parallel lattice-Boltzmann (LB) model. The packed beds are generated by means of discrete element method and have a wide range of particle sphericity. First, the LB model is used to validate the drag force coefficient of a single ellipsoid. The validated model is then extended to study the effects of sphericity and porosity on the fluid flow and quantify the drag force on particles in packed beds. Some unique flow structures are identified in relation to tortuous pore structures. Due to non-uniform structure and flow, the fluid-particle interaction forces vary giving a distribution. The results suggest that the mean drag forces on oblate particles are more sensitive to aspect ratio and hence sphericity than prolate ones. Based on the simulated data, a new equation is proposed to calculate the mean drag force on particles. The results show that the new equation is more accurate than the correlations in the literature.

AB - Fluid flow through packed beds of uniform ellipsoids is studied by a parallel lattice-Boltzmann (LB) model. The packed beds are generated by means of discrete element method and have a wide range of particle sphericity. First, the LB model is used to validate the drag force coefficient of a single ellipsoid. The validated model is then extended to study the effects of sphericity and porosity on the fluid flow and quantify the drag force on particles in packed beds. Some unique flow structures are identified in relation to tortuous pore structures. Due to non-uniform structure and flow, the fluid-particle interaction forces vary giving a distribution. The results suggest that the mean drag forces on oblate particles are more sensitive to aspect ratio and hence sphericity than prolate ones. Based on the simulated data, a new equation is proposed to calculate the mean drag force on particles. The results show that the new equation is more accurate than the correlations in the literature.

KW - Packed bed

KW - Porous media

KW - Lattice–Boltzmann simulation

KW - Fluid mechanics

KW - Drag force

KW - Particle-fluid flow

U2 - 10.1016/j.powtec.2015.06.047

DO - 10.1016/j.powtec.2015.06.047

M3 - Article

VL - 285

SP - 146

EP - 156

JO - Powder Technology

JF - Powder Technology

SN - 0032-5910

ER -