Particle simulation of vibrated gas-fluidized beds of cohesive fine powders

摘要: We have used three-dimensional particle dynamics simulations, coupled with volume-averaged gas phase hydrodynamics, to study vertically vibrated gas-fluidized beds of fine, cohesive powders. The interstitial flow is restricted be one-dimensional (1D). This simplified model captures the spontaneous development 1D traveling waves, which corresponds bubble formation in real fluidized beds. this probe manner vibration and combine influence particles. found that, as rate increases, cyclic pressure pulsation produced by becomes more significant than direct impact, a fully bed, virtually only relevant mechanism. demonstrate that assists fluidization creating large tensile stresses during transient periods, helps break up assembly into agglomerates.