Abstract
A bubble–emulsion two-fluid model is proposed for the simulation of gas–solid flow in bubbling fluidized beds. This work proposes an analogous research program, according to the analogies in the flow regime and the mechanism between a gas–solid bubbling fluidized bed and a gas–liquid bubble column. The research includes a complete description of the constitutive relationship for interphase forces around the bubbles, a comprehensive investigation of correlations for bubble and emulsion phase properties, and an in-depth analysis of the mechanism of radial nonuniformity in a fluidized bed. The model is verified through comparison of simulated results with experimental data of both Geldart A and B particles. The model is conducted on a coarse grid which shows more potential for the simulation of commercial fluidized equipment.
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