Abstract
Measurements of void heights were made at an orifice in the distributor plate of a three-dimensional fluidized bed when the orifice was surrounded by other similar bubbling orifices. The experimental evidence indicates that jets form only when the orifice is surrounded by stagnant zones of particles; this is consistent with the findings of Rowe [7] that it is possible to establish a jet if the particles are not fluidized. It has been shown that bed geometry has a significant effect on the jet height and results from two-dimensional beds or semicircular beds with draft tubes cannot be extrapolated to three-dimensional beds. Jet height data from draft tubes in semicircular beds and from three-dimensional beds have been correlated. The correlations represent the experimental data within ±30% accuracy.
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