A unified CFD methodology for Gas-Solid fluidized beds based on the Quasi-Three-Fluid approach

Abstract

This work aims on developing a unified numerical methodology which can be utilized for addressing the challenge of accurately describing mesoscale structures in the simulation of gas–solid fluidization systems. To achieve this goal, a dependable and unified model is established to correct the simulation results under diverse fluidization through adjusting the drag models or initial emulsion phase state, and several correction methods that are applicable to a variety of fluidizations are proposed. The developed quasi-three-fluid method can be used to accurately predict the mesoscale structures of bubbles and particle clusters in gas–solid fluidized beds with particle type of Geldart A or B. Furthermore, the unified analysis capability for gas–solid fluidized beds is improved via reasonable application of quasi-three-fluid approach.