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Behaviors of the bubble, cloud and emulsion phases in a fluidized bed

Andreux, Régis and Chaouki, Jamal Behaviors of the bubble, cloud and emulsion phases in a fluidized bed. (2008) AIChE Journal, vol. 5 (n° 2). pp. 406-414. ISSN 0001-1541

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Official URL: http://dx.doi.org/10.1002/aic.11390

Abstract

An intrusive bioptical probe provides radial profiles of the PDF (Probability Density Function) of the bubble, the cloud and the emulsion phases behaviors in a fluidized bed of Geldart-A particles. The fluidizing velocity ranges between 0.20 m/s and 0.80 m/s. The bed porosity, the overall averaged bubble chords and velocities are well-predicted by correlations of the literature. The cloud thickness is closely related to the bubble chord. The amount of gas traveling through the bubble phase never exceeds 15-20 % of the total gas flow rate. The averaged porosity of the bubble, the cloud and the emulsion phases is of 88-92 %, 65-70 % and 50-55 %, respectively. The reduced bubble porosity distribution obeys a constant normal law over the fluidizing velocity range. Each distribution of the reduced bubble chord and velocity, and of the reduced cloud thickness obey a constant log normal law over the fluidizing velocity range.

Item Type:Article
Additional Information:http://www3.interscience.wiley.com/journal/107061889/home
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Ecole Polytechnique de Montréal (CANADA)
French research institutions > Centre National de la Recherche Scientifique - CNRS
Laboratory name:
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Deposited By: Régis Andreux
Deposited On:20 Mar 2008 13:59

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