Abstract
Drift lines produced after a single bubble passage were measured in a 0.19 m i.d. three-dimensional gas-fluidised bed of 0.163 mm glass beads which contains tiny but recognizable aggregates of jetsam particles or bulk particle tracers. Lateral distributions of the descending distance of jetsam relative to the bulk particles were obtained from the difference between the jetsam and the bulk drift lines, and were then reduced to the average descending distance over the bubble cross-sectional area. The segregation rate constants were calculated for four kinds of jetsam, fairly larger or denser than the bulk particles, and were applied to the estimation of jetsam concentration profiles based on an existing mathematical model. The results of comparison of the estimated concentration profiles with those observed by other investigators were quite satisfactory, indicating that the experimental results here obtained are reliable.
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