Resonance-induced particle mixing and segregation phenomena in a forced oscillation fluidized bed

The mixing and segregation of binary particles in a fluidized bed are typically characterized by inherent unpredictability. However, this phenomenon can be effectively regulated by applying vibrating airflow and the resonance effect generated therein. This study found that the application of the resonance effect leads to an increase in the voidage of fluidized beds, which is conducive to changing the state of particle dispersion. In addition, the variation in particle characteristics and proportions has a significant impact on the behavior of particles. If there is a substantial difference between particle characteristics and proportions, even with the application of pulsation frequency, it will not change the type of floating particles. Furthermore, phase diagrams and particle segregation models were successfully established for the pulsed fluidized bed, allowing for accurate prediction of binary particle segregation and mixing phenomena. This research provides a comprehensive theoretical foundation for regulating particle mixing and segregation.