Abstract
It is difficult to accurately measure the parameters of solid particles in the experiment of the gas-solid fluidized bed. The numerical simulation plays an important role to accurately describe flow characteristics in the fluidized bed. Combined with the research work of the research group, this paper analyzes the application of numerical simulation of fluidized bed from the aspects of gas-solid coupling algorithm, drag model, flow characteristics, and reaction characteristics based on the previous studies. The specificity improvement of the gas-solid coupling algorithm and the regional application of the drag model is the trend of the recent development of numerical simulation. Previous studies mainly focus on the gas-solid two-phase flow field characteristics in the traditional fluidized bed, but few on the complex flow characteristics such as gas-solid reverse flow and the coupling with reaction characteristics. It is of great significance for designing a novel fluidized bed reactor to realize gas-solid continuous reaction to establish and improve the numerical simulation method of gas-solid non-catalytic reaction.
Highlights
Gas-solid fluidized bed has been widely used in petrochemical, pharmaceutical, drying, and other fields, the study of gas-solid two-phase flow has important significance for industrial equipment design and optimization of operating conditions
The particles are often used as catalysts in the traditional fluidized bed, which properties do not change in the reaction process, and are easy to be simplified in numerical simulation, so that the simulation results match well with the actual flow conditions
Bian et al [29] compared the results obtained by the Two-Fluid model (TFM) model, the Discrete phase model (DPM) model, and experiment on gas-solid flow in a dense fluidized bed, and the results indicated that the drag force between the two phases was the key to the accuracy of the simulation
Summary
Gas-solid fluidized bed has been widely used in petrochemical, pharmaceutical, drying, and other fields, the study of gas-solid two-phase flow has important significance for industrial equipment design and optimization of operating conditions. As an important method complementary to experimental research, numerical simulation will play a more important role in the analysis and research process of gas-solid fluidized bed.
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