1993 Volume 33 Issue 3 Pages 361-368
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.
