Aerodynamics of a vibrated fluid bed

Abstract

AbstractResults of an experimental study on the aerodynamics of a vertically vibrated fluidized bed of cross‐section 0.2 × 0.2 m are presented and discussed. Variables studied included frequency (0‐105 s−1), amplitude (0‐5xl0−3 m), bed height (12.5‐100×10−3 m), particle size (900‐3900 μm), particle density (570‐890 kgm−3), particle shape factor (0.55‐1.00) and the particle surface characteristics, i.e. presence of surface moisture.The effect of vibrational parameters on the fluidized bed pressure drop, the newly defined minimum mixing velocity, Umm and overall aerodynamic behaviour of the bed is discussed on the basis of quantitative as well as visual observations. Empirical correlations are proposed for δPmf and Umm, which were both found to decrease significantly with increase in the vibrational acceleration.