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Partic. vol. 39 pp. 68-77 (August 2018)
doi: 10.1016/j.partic.2017.10.003

An exploratory study of three-dimensional MP-PIC-based simulation of bubbling fluidized beds with and without baffles

Shuai Yanga,b,c,d, Hao Wuc,*, Weigang Lina,c, Hongzhong Lia,*, Qingshan Zhua

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haw@kt.dtu.dkhzli@ipe.ac.cn

Highlights

    • Hydrodynamics of Geldart A particles in BFB with baffles were simulated using MP-PIC method. • A modified structure-based (MSB) drag model and other two models were adopted in the simulation. • MSB performed better than the other models tested in predicting the gas–solid flow. • The MSB drag model need to be improved for adoption in CPFD to obtain accurate predictions.

Abstract

In this study, the flow characteristics of Geldart A particles in a bubbling fluidized bed with and without perforated plates were simulated by the multiphase particle-in-cell (MP-PIC)-based Eulerian–Lagrangian method. A modified structure-based drag model was developed based on our previous work. Other drag models including the Parker and Wen–Yu–Ergun drag models were also employed to investigate the effects of drag models on the simulation results. Although the modified structure-based drag model better predicts the gas–solid flow dynamics of a baffle-free bubbling fluidized bed in comparison with the experimental data, none of these drag models predict the gas–solid flow in a baffled bubbling fluidized bed sufficiently well because of the treatment of baffles in the Barracuda software. To improve the simulation accuracy, future versions of Barracuda should address the challenges of incorporating the bed height and the baffles.

Graphical abstract


Keywords

Baffle; Geldart A particles; Bubbling fluidized beds; Simulation; Multi-phase particle-in-cell; Computational particle fluid dynamics