Prediction of bubble size in a gas fluidised bed

Abstract It is shown that existing data on bubble size (when this is not restricted by the vessel dimensions) can be described by where (U — Umf) is the excess gas flow, h is the height above the distributor and h0, a measure of the initial bubble size, characterises the distributor. h0 is effectively zero for a porous plate but may be more than a meter for large tuyeres.