Orientation of cylindrical particles in gas–solid circulating fluidized bed--颗粒学报PARTICUOLOGY

Cai, J., Li, Q., & Yuan, Z. (2012). Orientation of cylindrical particles in gas–solid circulating fluidized bed. Particuology, 10(1), 89–96. https://doi.org/10.1016/j.partic.2011.03.012

Orientation of cylindrical particles in gas–solid circulating fluidized bed

Jie Cai ^a *, Qihe Li ^a, Zhulin Yuan ^b

a School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210042, Jiangsu, China
b Thermal-Energy Institute, Southeast University, Nanjing 210096, Jiangsu, China

10.1016/j.partic.2011.03.012

Volume 10, Issue 1, February 2012, Pages 89-96

Received 13 October 2010, Revised 24 January 2011, Accepted 21 March 2011, Available online 20 August 2011.

E-mail: nnucj@163.com

Highlights

Abstract

The orientation of cylindrical particles in a gas–solid circulating fluidized bed was investigated by establishing a three-dimensional Euler–Lagrange model on the basis of rigid kinetics, impact kinetics and gas–solid two-phase flow theory. The resulting simulation indicated that the model could well illustrate the orientation of cylindrical particles in a riser during fluidization. The influences of bed structure and operation parameters on orientation of cylindrical particles were then studied and compared with related experimental results. The simulation results showed that the majority of cylindrical particles move with small nutation angles in the riser, the orientation of cylindrical particles is affected more obviously by their positions than by their slenderness and local gas velocities. The simulation results well agree with experiments, thus validating the proposed model and computation.

Graphical abstract

Keywords

Euler–Lagrange model; Rigid kinetics; Impact kinetics; Orientation of cylindrical particles; Nutation angle

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