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

Yang, S., Wu, H., Lin, W., Li, H., & Zhu, Q. (2018). An exploratory study of three-dimensional MP-PIC-based simulation of bubbling fluidized beds with and without baffles. Particuology, 39, 68-77. https://doi.org/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 Yang ^{a b c d}, Hao Wu ^c *, Weigang Lin ^{a c}, Hongzhong Li ^a *, Qingshan Zhu ^a

a State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, P.O. Box 353, Beijing 100190, China
b State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering, Qingdao 266071, China
c Department of Chemical and Biochemical Engineering, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
d Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, China

10.1016/j.partic.2017.10.003

Volume 39, August 2018, Pages 68-77

Received 14 September 2017, Revised 9 October 2017, Accepted 11 October 2017, Available online 1 February 2018, Version of Record 17 May 2018.

E-mail: haw@kt.dtu.dk; hzli@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

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