Bed collapse technique for estimating parameters of generalized wake model for a three‐phase fluidized bed

Abstract

AbstractThe hydrodynamic behaviour of a cocurrent gas‐liquid‐solid fluidized bed was studied by using the bed collapse technique. The key parameters, k and x, of the generalized wake model were estimated. Compared with other existing methods for evaluating the parameters k and x, the bed collapse technique shows some distinct advantages. Parameters are derived directly from experiments in a three‐dimensional three‐phase fluidized bed and there is no need to assume that a bubble and its wake form a perfect sphere. Hold‐up data of the three‐phase fluidized bed predicted by the generalized wake model with k and x estimated by the bed collapse technique are in good agreement with those obtained via the traditional pressure‐drop method.