A unified model for fast fluidization dynamics - Part IV: Fundamental refining and sub-model optimization

On the basis of the authors' previous work, more fundamental refining to the unified model proposed for fast fluidization dynamics was performed, including 1) mechanistic determination of the model parameter n and the effective velocity factor of dilute phase F(β), 2) reconstruction of Yang's formula for type A chocking, 3) reform of Harris's correlation for cluster size, and 4) prediction of cluster voidage and revisions to dense phase model. Then, more strict comprehensive comparisons to experimental data available in literatures regarding to type C choking, the solids holdups for both upper dilute and bottom dense regions, and transitions to high density fast fluidization and dense suspension up-flow were made, which verified the model well.