Abstract
The motion of the solids thrown above the bed surface by single bubble eruptions was studied using a high speed video system. Data on the motion of the bubble and emulsion phases are presented as functions of bubble size, type of bed material, fluidizing velocity and bed depth. When plotted in dimensionless form, the trajectories of the tops of the bulge layer, bubble and wake can be condensed into three universal curves which represent the trajectories for these points for the entire range of bed materials, bubble sizes, fluidization velocities and bed depths tested. There appeared to be no significant effect of excess air, bubble size or bed depth on the dimensionless heights reached by the wake and bulge materials. In all cases the bulge material was ejected to a greater height above the bed than the wake.
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