Abstract
The drag force acting against a spherical float was investigated to define the complex flow of gas-liquid mixture in a bubble bed, and was converted to the average intensity of bulk flow, vz. The values of vz were found to be quite uniform over the central half cross-section of the bed and its directions were upward.
Over the outer annular cross-section, the values of vz were equal to those in the central section although their directions were downward.
Effects of various factors were further investigated, and a method for the calculation of vz was also established.
