Pressure drop in solid-liquid fluidised beds

Models have been developed for the prediction of wall pressure drop in solid-liquid fluidised beds (SLFB). Both laminar and turbulent regimes have been considered. These models explain the pressure drop characteristics of the limiting cases of SLFB: the fixed bed and the single-phase pipe flow. Pressure drop was measured in a 78 mm i.d. solid-liquid fluidised bed. Particle size was varied in the range of 0.55 - 3.1 mm. The bed voidage was varied in the range of 0.4 to 0.9. Good agreement has been shown between model predictions and experimental observations of pressure drop