Detailed measurements of flow structure inside a dense gas-solids fluidized bed

Haiyan Zhu, Jesse Zhu, Guozheng Li, Fengyun Li

Research output: Journal PublicationArticlepeer-review

112 Citations (Scopus)


Detailed local flow structures are investigated in bubbling and turbulent fluidized bed with FCC particles. The operating conditions ranges from 0.06 to 1.4 m/s. Extensive experiments are carried out using a newly developed optical fiber probe system, which can measure the solids concentration and velocity at multi-points. The results reveal that with increasing Ug, local solids concentrations go through three evolution stages, reflecting a gradual regime transition process. Under all operating conditions, upflowing and descending particles co-exist at all measuring locations. The upflowing particle velocity is strong function of both superficial gas velocity and spatial position. However, the descending particle velocity mainly depends on superficial gas velocity. The bed radial symmetry and the effects of static bed height on the local flow structures are also investigated.

Original languageEnglish
Pages (from-to)339-349
Number of pages11
JournalPowder Technology
Issue number3
Publication statusPublished - 22 Jan 2008
Externally publishedYes


  • Dynamic two-phase flow structure
  • Particle velocity
  • Radial symmetry
  • Solids concentration
  • Turbulent fluidized bed

ASJC Scopus subject areas

  • Chemical Engineering (all)


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