The dynamics and structure of a liquid-solid fluidized bed in inclined pipes

Bachtiyar Yakubov, Josef Tanny*, David Moalem Maron, Neima Brauner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The dynamics and structure of a fluidized bed in inclined columns are investigated experimentally. Experiments were conducted in two glass columns of L/D = 95 and 150, and diameters of 2.58 and 2.78 cm, which can be positioned in the whole range of inclination angles, from horizontal to vertical. The fluidizing agent is water and the grain material is particles of different densities and characteristic diameters. Measurements of the pressure loss, flow rate of the fluidizing agent and fluidized bed position and height are carried out. Particle flow patterns were visualized using a digital camera. The expansion process of the fluidized bed depends strongly on the inclination angle. Consequently the critical velocity for the bed escape varies with the column inclination angle and exhibits a maximum at about 45°. The column length was found to have a minor effect on the phenomena involved.

Original languageEnglish
Pages (from-to)105-114
Number of pages10
JournalChemical Engineering Journal
Issue number2-3
StatePublished - 1 Apr 2007


  • Escape critical flow rate
  • Inclination angle
  • Initial bed height
  • Particle density
  • Particle diameter
  • Pressure loss


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