Numerical investigations on gas–solid flow in circulating fluidized bed risers using a new cluster-based drag model

Zeneng Sun, Chao Zhang, Jesse Zhu

Research output: Journal PublicationArticlepeer-review

4 Citations (Scopus)

Abstract

A cluster-based drag model is proposed for the gas–solid circulating fluidized bed (CFB) riser by including the cluster information collected from image processing and wavelet analysis into the calculation of system drag. The performance of the proposed drag model is compared with some commonly used drag models. A good agreement with the experimental data is achieved by the proposed cluster-based drag model. Error analysis of the proposed cluster-based drag model based on the local distributions of solids holdup and particle velocity is conducted. The clustering phenomenon in the low-density and high-density CFB risers and the effect of the cluster size on the simulation accuracy are also numerically studied by the proposed drag model.

Original languageEnglish
Pages (from-to)9-23
Number of pages15
JournalParticuology
Volume63
DOIs
Publication statusPublished - Apr 2022
Externally publishedYes

Keywords

  • Circulating fluidized bed
  • Clustering effect
  • Drag model
  • Gas–solid flow structures

ASJC Scopus subject areas

  • Chemical Engineering (all)
  • Materials Science (all)

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