3D simulation of the effects of sphericity on char entrainment in fluidised beds

K. Papadikis, S. Gu*, A.V. Bridgwater

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

The paper presents a 3-dimensional simulation of the effect of particle shape on char entrainment in a bubbling fluidised bed reactor. Three char particles of 350 μm side length but of different shapes (cube, sphere, and tetrahedron) are injected into the fluidised bed and the momentum transport from the fluidising gas and fluidised sand is modelled. Due to the fluidising conditions, reactor design and particle shape the char particles will either be entrained from the reactor or remain inside the bubbling bed. The sphericity of the particles is the factor that differentiates the particle motion inside the reactor and their efficient entrainment out of it. The simulation has been performed with a completely revised momentum transport model for bubble three-phase flow, taking into account the sphericity factors, and has been applied as an extension to the commercial finite volume code FLUENT 6.3.

Original languageEnglish
Pages (from-to)749-758
Number of pages10
JournalFuel Processing Technology
Volume91
Issue number7
Early online date12 Mar 2010
DOIs
Publication statusPublished - Jul 2010

Keywords

  • CFD
  • entrainment
  • fluidized bed
  • particle shape
  • sphericity

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