Prediction of flow regimes in spout-fluidized beds

Five main flow regimes in spout-fluidized bed were identified in this study, namely, fixed bed, spout with aeration, spout-fluidization, jet in fluidized bed and slugging, together with their corresponding major frequencies translated from pressure signals. The empirical equation A = aBb, in which A = Fr*/(H′/Di) and B = (Fr*/(H′/Di))/(ugt/umf) are respectively the spout-geometry and spout-geometry-fluidization dimensionless numbers, was proposed to distinguish these flow regimes.