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Fast versus Turbulent Fluidization of Geldart Group B particles
  • Jia Wei Chew,
  • Ray Cocco
Jia Wei Chew
Nanyang Technological University
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Abstract

Both fast and turbulent fluidized beds exhibit entrainment, but the differences in the flow phenomena are not well understood. This study targeted a comparative analysis of the cluster (or streamer), mass flux, and segregation datasets from these two fluidization regimes. The particle systems were narrow particle size distributions (PSDs), binary mixtures, or broad PSDs of Geldart Group B particles. Relative to the fast fluidized bed, the turbulent bed exhibited (i) higher cluster probability and frequency, but lower cluster duration; (ii) lower local mass flux; and (iii) similar segregation extents. Regarding clusters, the relative dominance of the variables on probability was similar for both regimes, but there was a difference for probability and frequency. For overall mass flux, particle-related properties were more dominant with the turbulent bed. As for segregation, the radial position was the most influential in the fast fluidized bed, but the least in the turbulent one.

Peer review status:Published

15 Jul 2020Submitted to AIChE Journal
21 Jul 2020Submission Checks Completed
21 Jul 2020Assigned to Editor
06 Aug 2020Reviewer(s) Assigned
09 Oct 2020Editorial Decision: Revise Minor
14 Oct 20201st Revision Received
23 Oct 2020Submission Checks Completed
23 Oct 2020Assigned to Editor
10 Nov 2020Reviewer(s) Assigned
30 Dec 2020Editorial Decision: Revise Minor
04 Jan 20212nd Revision Received
07 Jan 2021Submission Checks Completed
07 Jan 2021Assigned to Editor
18 Jan 2021Editorial Decision: Accept
03 Feb 2021Published in AIChE Journal. 10.1002/aic.17216