Rotation characteristic and granular temperature analysis in a bubbling fluidized bed of binary particles--颗粒学报PARTICUOLOGY

Wang, T., He, Y., Yan, S., & Kim, D. R. (2015). Rotation characteristic and granular temperature analysis in a bubbling fluidized bed of binary particles. Particuology, 18, 76–88. https://doi.org/10.1016/j.partic.2014.02.011

Rotation characteristic and granular temperature analysis in a bubbling fluidized bed of binary particles

Tianyu Wang ^a, Yurong He ^a *, Shengnan Yan ^a, Dong Rip Kim ^b

a Department of Power Engineering, Harbin Institute of Technology, Harbin, China
b Department of Mechanical Engineering, Hanyang University, Seoul 133-791, South Korea

10.1016/j.partic.2014.02.011

Volume 18, February 2015, Pages 76-88

Received 16 December 2013, Revised 29 January 2014, Accepted 26 February 2014, Available online 21 July 2014.

E-mail: rong@hit.edu.cn

Highlights

• An improved sub-grid scale model in large eddy simulation method was applied.

• The particle rotational granular temperature was investigated.

• The effects of restitution coefficients and binary solid composition were investigated.

• The anisotropy characteristics of particles were presented.

Abstract

In this work, a discrete particle model (DPM) was applied to investigate the dynamic characteristics in a gas–solid bubbling fluidized bed of binary solid particles. The solid phase was simulated by the hard-sphere discrete particle model. The large eddy simulation (LES) method was used to simulate the gas phase. To improve the accuracy of the simulation, an improved sub-grid scale (SGS) model in the LES method was also applied. The mutative Smagorinsky constant case was compared with the previously published experimental data. The simulation by the mutative Smagorinsky constant model exhibited better agreement with the experimental data than that by the common invariant Smagorinsky constant model. Various restitution coefficients and different compositions of binary solids were investigated to determine their influences on the rotation characteristics and granular temperatures of the particles. The particle translational and rotational characteristic distributions were related to certain simulation parameters.

Graphical abstract

Keywords

Smagorinsky constant; Rotational characteristics; Binary mixture particles; Large eddy simulation; Discrete hard sphere model

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