VELOCITY CHARACTERISTICS IN LIQUID-SOLID FLUIDIZED-BEDS

A model is developed to predict bed voidage in liquid-solid fluidised bed based on slip velocity concept. The model considers comprehensivel y all hindrance effects such as wall effect, buoyancy effect and parti cle-particle effects. Experimental data on bed expansion, pressure dro p and bed voidage are collected in a column of 7.53 cm i.d. and 100 cm in height, covering a wide range in now rate of the fluid and physica l property of materials. The model predictions are satisfactorily comp ared with the experimental data of the present study as well as that r eported in literature.