SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2013, Vol. 21 ›› Issue (7): 800-807.DOI: 10.1016/S1004-9541(13)60500-X

• ENERGY, RESOURCES AND ENVIRONMENTAL TECHNOLOGY • Previous Articles     Next Articles

Comparison of Construction Method for DEM Simulation of Ellipsoidal Particles

TAO He1, ZHONG Wenqi2, JIN Baosheng 2   

  1. 1 School of Civil Construction, Zhengzhou Institute of Aeronautical Industry Management, Zhengzhou 450000, China;
    2 School of Energy & Environment, Southeast University, Nanjing 210096, China
  • Received:2011-11-02 Revised:2012-08-16 Online:2013-08-24 Published:2013-07-28
  • Supported by:

    Supported by the Major State Basic Research Development Program of China (2011CB201505), the National Natural Science Foundation of China (50976025) and the Key Project of Science and Technology of Henan Province (12B610012).

Comparison of Construction Method for DEM Simulation of Ellipsoidal Particles

陶贺1, 钟文琪2, 金保升2   

  1. 1 School of Civil Construction, Zhengzhou Institute of Aeronautical Industry Management, Zhengzhou 450000, China;
    2 School of Energy & Environment, Southeast University, Nanjing 210096, China
  • 通讯作者: ZHONG Wenqi
  • 基金资助:

    Supported by the Major State Basic Research Development Program of China (2011CB201505), the National Natural Science Foundation of China (50976025) and the Key Project of Science and Technology of Henan Province (12B610012).

Abstract: Discrete element model was developed to simulate the ellipsoidal particles moving in the moving bed. Multi-element model was used to describe a ellipsoidal particle, the contact detection algorithm of ellipsoidal particle was developed, and both contact force and gravity force were considered in the models. The simulation results were validated by our experiment. Three algorithms for representing an ellipsoidal particle were compared in macro and micro aspects. The results show that there exists big difference in the microscopic parameters such as kinetic energy, rotational kinetic energy, deformation, contact force and collision number which leads to the difference of macroscopic parameters. The relative error in the discharge rate and tracer particle position is the largest between 3-tangent-element representation and experimental results. The flow pattern is similar for the 5-element and 3-intersection representations. The only difference is the discharge rate of 5-element representation is larger than the experimental value and that of the 3-intersection representation has the contrary result. Finally the 3-intersection- element representation is chosen in the simulation due to less computing time than that of the 5-element representation.

Key words: ellipsoidal particle, multi-element model, moving bed, discrete element model, construction method

摘要: Discrete element model was developed to simulate the ellipsoidal particles moving in the moving bed. Multi-element model was used to describe a ellipsoidal particle, the contact detection algorithm of ellipsoidal particle was developed, and both contact force and gravity force were considered in the models. The simulation results were validated by our experiment. Three algorithms for representing an ellipsoidal particle were compared in macro and micro aspects. The results show that there exists big difference in the microscopic parameters such as kinetic energy, rotational kinetic energy, deformation, contact force and collision number which leads to the difference of macroscopic parameters. The relative error in the discharge rate and tracer particle position is the largest between 3-tangent-element representation and experimental results. The flow pattern is similar for the 5-element and 3-intersection representations. The only difference is the discharge rate of 5-element representation is larger than the experimental value and that of the 3-intersection representation has the contrary result. Finally the 3-intersection- element representation is chosen in the simulation due to less computing time than that of the 5-element representation.

关键词: ellipsoidal particle, multi-element model, moving bed, discrete element model, construction method