Abstract
A bubble eruption model in which the effect of bubble coalescence near the bed surface on particle ejection from a gas-solid fluidized bed is proposed. It is a statistical model based on detailed measurement of the relationship between bubble coalescence at the bed surface and particle swarm ejection caused by bubble eruption. By this model, the passing frequency of particle swarms in the freeboard, the maximum rise height of the particle swarms, and the entrainment rate below the TDH can be simulated, In particular, the effect of the superficial gas velocity on the passing frequency or the entrainment rate, which has not been evaluated by model analysis, can be predicted properly.
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