Coupled simulation of fluid-particle interaction for large complex granules: A resolved CFD-DEM method for modelling the airflow in a vertical fixed bed of irregular sinter particles--颗粒学报PARTICUOLOGY

Li, C., Zhang, Y., Shen, J., & Zhang, W. (2024). Coupled simulation of fluid-particle interaction for large complex granules: A resolved CFD-DEM method for modelling the airflow in a vertical fixed bed of irregular sinter particles. Particuology, 90, 292-306. https://doi.org/10.1016/j.partic.2024.01.002

Coupled simulation of fluid-particle interaction for large complex granules: A resolved CFD-DEM method for modelling the airflow in a vertical fixed bed of irregular sinter particles

Chengzhi Li ^{a b}, Yu Zhang ^{a b}, Jiahe Shen ^{c d}, Wei Zhang ^{a b *}

a The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
b Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China
c School of Transportation and Logistics Engineering, Wuhan University of Technology, Wuhan 430063, China
d Centre for Bulk Solids and Particulate Technologies, The University of Newcastle, Callaghan NSW 2308, Australia

10.1016/j.partic.2024.01.002

Volume 90, July 2024, Pages 292-306

Received 7 November 2023, Revised 1 January 2024, Accepted 3 January 2024, Available online 12 January 2024, Version of Record 7 February 2024.

E-mail: wei_zhang@wust.edu.cn

Highlights

• Multi-sphere clumped method is used to create irregular sinter particles in DEM.

• Interaction force between air and sinter particles is directly calculated by immersed boundary method.

• High resolution of airflow around sinter particles is obtained using cell refinement.

• Airflow field in a vertical fixed bed of sinter particles has been simulated.

• Simulated air pressure drops are well validated by the experimental results.

Abstract

A resolved CFD-DEM method is proposed to simulate the fluid-particle interaction for large complex granules. The airflow in a vertical sinter fixed bed is numerically studied using this method. The multi-sphere clumped method is used to create irregular sinter particles in DEM. The immersed boundary method and dynamic cell refinement are applied to describe the fluid flow around particles with higher resolution, by which the fluid-particle interaction can be simulated more accurately. The simulation results presented the packing voidage distributions and the airflow fields in the sinter beds of different single and mixed particle size ranges. The bed pressure drops were simulated and the results were compared with the corresponding experimental ones. The good agreement indicated that the proposed resolved CFD-DEM method is an effective tool to model the fluid-particle interaction for irregular large granules in the gas-solid multi-phase systems.

Graphical abstract

Keywords

Resolved CFD-DEM method; Irregular sinter particles; Multi-sphere clumped method; Immersed boundary method; Dynamic cell refinement

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