Effects of the Viscosity of Liquid on the Characteristics of Vertical Bubbling Jet in a Cylindrical Vessel

Water and aqueous glycerol solutions were used to examine the effects of the viscosity of liquids on the bubble dispersion in vertical bubbling jets. Gas holdup, bubble diameter, and bubble rising velocity were measured using the electro-resistivity probe method. Observation of bubbles was made by m...

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Bibliographic Details
Published in:ISIJ International 1993/03/15, Vol.33(3), pp.361-368
Main Authors: Iguchi, Manabu, Kawajiri, Akira, Tomida, Hiroshi, Morita, Zen-ichiro
Format: Article
Language:English
Subjects:
bubble diameter
bubble rising velocity
bubbling jet
gas holdup
highly viscous liquid
injection
Schlieren method
steelmaking
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Summary:Water and aqueous glycerol solutions were used to examine the effects of the viscosity of liquids on the bubble dispersion in vertical bubbling jets. Gas holdup, bubble diameter, and bubble rising velocity were measured using the electro-resistivity probe method. Observation of bubbles was made by means of Schlieren method and a high speed video camera system. With increasing the viscosity, bubbles tended to flock together around the center line of the vessel and rise after the foregoing bubble. The radial distributions of gas holdup were classified into four types as functions of the axial distance, gas flow rate and the viscosity of liquid. Correlations of gas holdup developed for air-water bubbling jets were valid for bubbling jets in aqueous glycerol solutions when the bubble Reynolds number was greater than about 400.
ISSN:0915-1559
1347-5460
DOI:10.2355/isijinternational.33.361