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As a supplementary paper, this article answers some questions that remain unsolved in our previous work — “A type-A-choking-oriented unified model for fast fluidization dynamics”, namely how to predict the axial solids holdup distribution and the minimum solid flux for fast fluidization. Starting from the physico-mathematical model of “cluster rebound at the dense bottom” proposed by the authors,...
Starting from analysis to Yang's formula for type A choking, a unified and self-consistent model for fast fluidization dynamics, named the separate-phase-coexistence model, was proposed in this paper. The basic assumptions used in the model are that all the gas from outside enters the solid-saturated upward dilute phase, to which the Yang's formula is still applied, yet revised with an effective velocity...
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