Scale-up effects of the flow structure in bubbling and turbulent fluidized beds

Xiaoyang Wei, Jiangshan Liu, Jesse Zhu

Research output: Journal PublicationArticlepeer-review

6 Citations (Scopus)

Abstract

In bubbling and turbulent fluidized beds, gas bubbles are dispersed in the emulsion phase with the bubble cloud as the transition, offering a vigorous interaction between gas and particles. Despite numerous studies in the literature, many difficulties were encountered for modeling and scale-up. Hence, it is imperative to further study the flow details and scale-up effects. In this work, instantaneous solids holdup was captured in bubbling and turbulent fluidized beds using an optical fiber probe. The degree of local segregation was quantified with the intermittency index. Then, according to the signal details, phases, namely bubble phase, bubble cloud and emulsion phase, can be easily identified and characterized in perspectives of solids holdup and time fraction. Finally, the influences of the column diameter and static bed height were systematically analyzed to study scale-up effects.

Original languageEnglish
Pages (from-to)223-230
Number of pages8
JournalPowder Technology
Volume379
DOIs
Publication statusPublished - Feb 2021
Externally publishedYes

Keywords

  • Bubbles
  • Bubbling fluidized bed
  • Emulsion phase
  • Optical fiber probe
  • Scale-up
  • Turbulent fluidized bed

ASJC Scopus subject areas

  • Chemical Engineering (all)

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