Fluid dynamics of a pressurized fluidized bed: comparison between numerical solutions from two-fluid models and experimental results
Journal article, 1999

A validation of four different two-fluid model closures was carried out to investigate the effect of gas-phase turbulence, drift velocity and three dimensionality on the fluid dynamics of a bubbling fluidized bed. At atmospheric conditions, it is verified that gas-phase turbulence has a negligible effect for the bed material and operating conditions used in the investigation, whereas the validation shows some evidence that the gas-phase turbulence has a significant contribution for higher pressures. The drift velocity shows no noticeable effect on the results at any pressure. A comparison between two- and three-dimensional calculations at atmospheric pressure shows that the three-dimensional effects appear to be considerable.


Granular flow theory

Two-fluid model

Fluidized bed



Hans Enwald

Alf-Erik Almstedt

Chalmers, Department of Thermo and Fluid Dynamics

Chalmers, Applied Mechanics

Chemical Engineering Sciences

0009-2509 (ISSN)

Vol. 54 3 329-342

Subject Categories

Chemical Engineering

Fluid Mechanics and Acoustics



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