Reduction in minimum fluidization velocity and minimum bubbling velocity in gas-solid fluidized beds due to vibration

Vibration of gas-solid fluidized beds is often used to enable fluidization cohesive particles; however, it has also been shown reduce the minimum velocity (Umf). Here, we show via experiments that vibration can both Umf and bubbling (Umb) in Geldart Group B D particles. We observe reduced more than Umb, thereby creating a densely packed, bubble-free state when superficial gas between Umb. Umb decrease with increasing frequency amplitude results for across variety conditions could be plotted along single curve versus strength, i.e. ratio peak acceleration gravitational acceleration. Changes due are not affected significantly by changing particle density, but non-monotonic way diameter.