Investigation and modeling of cocurrent downflow circulating fluidized bed (downer)

Y. L. Yang, J. X. Zhu, Y. Jin, Z. Q. Yu

Research output: Journal PublicationArticlepeer-review

8 Citations (Scopus)

Abstract

To simulate the gas and solids flow structure in downflow circulating fluidized beds or downer reactors, a two-dimensional two-phase turbulence hydrodynamic model (κ - ε turbulence model) was developed. The influence of solid particles on the turbulence structure of the gas phase has been considered in deriving the hydrodynamic model. An improved numerical method (based on the SIMPLE method) is used for the flow model calculation. The predicted radial distributions of axial gas and particle velocities are in good agreement with the experimental data determined by LDV measurement. This turbulence hydrodynamic model provides a good description of the gas and solids flow structure in the downer.

Original languageEnglish
Pages (from-to)133-157
Number of pages25
JournalChemical Engineering Communications
Volume170
DOIs
Publication statusPublished - 1998
Externally publishedYes

Keywords

  • Downers
  • Flow structure
  • Gas-solid hydrodynamic modelling
  • κ-ε turbulence model

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering

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