CFD modelling and simulation of hydrodynamics in liquid-solid circulating fluidized beds

Yi Cheng, Jing Xu Zhu

Research output: Journal PublicationArticlepeer-review

71 Citations (Scopus)

Abstract

Hydrodynamics in liquid-solid circulating fluidized beds (LSCFBs) are modelled and simulated by computational fluid dynamic (CFD) technique. Turbulence model and kinetic theory descriptions of granular flow are incorporated in the governing equations to model the high Reynolds number two-phase flows with strong particle-particle interactions in LSCFBs. Liquid-solid upflows under wide operating conditions, different particle properties and different bed dimensions are investigated by time-dependent simulations using commercial software, FLUENT 4.5.6. The model predictions show good agreements with the experimental data and reasonable trends when different fluids/solids and bed dimensions are applied. Stronger nonuniformities in flow structures are found in larger particle systems, with larger fluid/solids density ratios and/or larger diameter columns.

Original languageEnglish
Pages (from-to)177-185
Number of pages9
JournalCanadian Journal of Chemical Engineering
Volume83
Issue number2
DOIs
Publication statusPublished - Apr 2005
Externally publishedYes

Keywords

  • CFD
  • Flow structure
  • Hydrodynamics
  • Liquid-solid circulating fluidized bed
  • Nonuniformity

ASJC Scopus subject areas

  • Chemical Engineering (all)

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