CFD modelling of liquid fluidized beds in slugging mode

Paola Lettieri, Renzo Di Felice, Roberta Pacciani, Olumuyiwa Owoyemi

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

Computational Fluid Dynamics (CFD) modelling has been used to simulate a liquid fluidized bed of lead shot in slugging mode. Simulations have been performed using a commercial code, CFX4.4. The kinetic model for granular flow, which is already available in CFX, has been used during this study. 2D time-dependent simulations have been carried out at different water velocities. Simulated aspects of fluidization such as voidage profiles, slug formation, pressure drop and pressure fluctuations have been analysed. The fluid-bed pressure drop was found to be greater than the theoretical one at all velocities, in agreement with experimental observations reported for fully slugging fluidized beds. Power spectral density analysis of the pressure signal was used to investigate the development of the flow pattern and the structure of the fluid-bed with increasing fluidizing velocity. A comparison between experimental and simulated results is also reported.

Original languageEnglish
Pages (from-to)94-103
Number of pages10
JournalPowder Technology
Volume167
Issue number2
DOIs
Publication statusPublished - Sep 15 2006

Keywords

  • CFD
  • Granular kinetic model
  • Liquid-fluidized beds
  • Pressure drop
  • Slugging mode

ASJC Scopus subject areas

  • Chemical Engineering(all)

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