Research on stacking angle of coal particles and parameter calibration on EDEM

doi:10.16265/j.cnki.issn1003-3033.2020.07.017

Abstract

Abstract: In order to make numerical simulation results on EDEM in better agreement with flow characteristics of coal particles, orthogonal experiments of particle-particle contact parameters calibration were designed and a calibration method was proposed based on stacking angle of particles. Then, optimal level of parameters and significance of their impact on stacking angle were analyzed by utilizing range analysis and variance analysis methods. The results show that stacking angle of 550-600 μm coal particles is 33.33°, and rolling friction coefficient induces most significant influence on it, followed by coefficient of static friction and that of restitution. Moreover, when coefficient of restitution, static friction and rolling frction is 0.3, 0.5 and 0.1 respectively on EDEM, stacking angle of coal particles will be 30.13° with a relative error of merely 0.66%, indicating that is an optimal contact parameter combination.

Key words: EDEM, pulverized coal particles, stacking angle, particle-particle contact parameters, orthogonal experiment

CLC Number:

X936

WEN Xiaojiang, FANG Feifei, LIU Yingke, LI Jian. Research on stacking angle of coal particles and parameter calibration on EDEM[J]. China Safety Science Journal, 2020, 30(7): 114-119.

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