Abstract
Axial dispersion coefficients of large spheres in a liquid fluidized bed have been measured. The inlet to outlet sojourn type of residence time distribution method in a system governed by the dispersion equation is applied. From the average passage time of a paramagnetic tracer particle through two detection planes, created by mutual inductors, the axial dispersion coefficient is obtained. The results are compared with those obtained by a visual technique based on the Einstein-Smoluchowski equation. The axial particle dispersion data obtained are an extension of the available literature data to higher liquid velocities; they are well in line with these data. The axial particle dispersion coefficient in liquid fluidized beds is roughly given by: ▪
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