1992 Volume 78 Issue 3 Pages 407-414
Gas holdup α and bubble frequency fB in mercury-air vertical bubbling jet in a cylindrical vessel were measured by means of an electro-resistivity probe. On the basis of the present and previously published experimental results, correlations for α, fB and mean bubble rising velocity uB were derived as functions of injected gas flow rate Qg and nozzle diameter dn. These correlations are valid in the vicinity of nozzle exit where the expansion of gas due to static pressure change is negligible. Furthermore, correlations for α, fB and uB applicable to bubbling jets with density ratio ρl/ρg between about 800 and 12000 were proposed as functions of Qg, dn and ρl/ρg, where ρg is the density of gas and ρl is the density of liquid.