Three-dimensional CFD-DEM investigation of dynamic characteristics of biomass particles in a conical spouted bed--颗粒学报PARTICUOLOGY

Hao, M., & Xing, X. (2025). Three-dimensional CFD-DEM investigation of dynamic characteristics of biomass particles in a conical spouted bed. Particuology, 97, 207-218. https://doi.org/10.1016/j.partic.2024.11.013

Three-dimensional CFD-DEM investigation of dynamic characteristics of biomass particles in a conical spouted bed

Ming Hao a b, Xiaolong Xing c

a The Key Laboratory of Enhanced Oil and Gas Recovery of Educational Ministry, Northeast Petroleum University, Daqing, 163318, China
b Post-doctoral Working Station of Liaohe Oil Field Company, Panjin, 124010, China
c Department of Engineering Mechanics, Zhejiang University, 310027, Hangzhou, China

10.1016/j.partic.2024.11.013

Volume 97, February 2025, Pages 207-218

Received 31 August 2024, Revised 13 November 2024, Accepted 21 November 2024, Available online 5 December 2024, Version of Record 16 January 2025.

E-mail: 12224049@zju.edu.cn

Highlights

• Three operation parameters of the three-dimensional spouted bed are constructed.

• CFD-DEM model of particle spouted bed is established.

• Flow pattern, fountain frequency, and bubble characteristics are analyzed.

• Effect of conical angles under various operation condition are also examined.

• Differences caused by inlet gas velocity and particle diameter are explored.

Abstract

A numerical investigation of the three-dimensional conical spouted bed was conducted using CFD coupled with discrete element method to systematically analyze particle-gas flow patterns, bubble volume fluctuations, and fountain characteristics. Moreover, the impact of conical angles on dynamic characteristics is demonstrated under varying gas inlet velocity and particle diameter. Firstly, the simulation result shows that increasing the conical angle is advantageous for enhancing both y-direction and angular velocities of particles, while the impact of this angle varies with inlet velocity and particle diameter. The great inlet velocity and particle diameter significantly enhance the voidage, while the larger conical angle promotes the uniform radial particle distribution. Besides, smaller conical angle and medium inlet velocity is prone to result in the higher frequency and amplitude for the fluctuations of particle height. Meanwhile, enlarging the conical angle results in a shift of the fountain frequency from high to low when the particle size is small. The conical angle plays a crucial role in determining bubble behavior under the condition of medium velocity and small diameter. Besides, the fine particle and small conical angle are prone to cause the noticeable main frequencies.

Graphical abstract

Keywords

Spouted bed; DEM; Conical angle; Inlet velocity; Particle diameter

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