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

Hans Enwald ; Alf-Erik Almstedt (Institutionen för tillämpad mekanik ; Institutionen för termo- och fluiddynamik)
Chemical Engineering Science (0009-2509). Vol. 54 (1999), 3, p. 329-342.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Fluidized bed, Two-fluid model, Granular flow theory, Turbulence, Validation



Denna post skapades 2006-08-28. Senast ändrad 2013-05-29.
CPL Pubid: 16437

 

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Institutioner (Chalmers)

Institutionen för tillämpad mekanik
Institutionen för termo- och fluiddynamik (1989-2004)

Ämnesområden

Strömningsmekanik
Kemiteknik

Chalmers infrastruktur