Number Concentration of Cylindrical Particles in a Fluidized Bed

doi:10.1016/S1004-9541(13)60446-2

Chin.J.Chem.Eng. ›› 2013, Vol. 21 ›› Issue (1): 94-103.DOI: 10.1016/S1004-9541(13)60446-2

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

Number Concentration of Cylindrical Particles in a Fluidized Bed

CAI Jie¹, ZHAO Xiaobao¹, LI Qihe¹, YUAN Zhulin²

1 School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210042, China;
2 Thermal-Energy Institute, Southeast University, Nanjing 210096, China

Received:2011-04-06 Revised:2012-09-16 Online:2013-02-04 Published:2013-02-28
Supported by:
Supported by the Natural Science Fund for Colleges and Universities in Jiangsu Province (2011112TSJ0149) and Jiangsu Key Laboratory of Process Enhancement & New Energy Equipment Technology at Nanjing University of Technology, China.

Number Concentration of Cylindrical Particles in a Fluidized Bed

蔡杰¹, 赵孝保¹, 李奇贺¹, 袁竹林 ²

1 School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210042, China;
2 Thermal-Energy Institute, Southeast University, Nanjing 210096, China

通讯作者: CAI Jie
基金资助:
Supported by the Natural Science Fund for Colleges and Universities in Jiangsu Province (2011112TSJ0149) and Jiangsu Key Laboratory of Process Enhancement & New Energy Equipment Technology at Nanjing University of Technology, China.

Abstract

Abstract: In this study, a three-dimensional model based on RANS, slender-body theory and Newton-Euler dynamics is established to study the number concentration, one of the most important fluidization characteristics of cylindrical particles. Also, the effects of interaction between cylindrical particles are taken into account by introducing the rigid collision dynamics. To validate the model, the fluidization experiments of cylindrical particles in a cold-state fluidized bed are carried out. The number concentration characteristics of cylindrical particles are obtained from computational fluid dynamics (CFD) simulation. It is found that cylindrical particles arriving at the exit of the riser the earliest come from the near-wall regions, the horizontal transfer of so many cylindrical particles from the radial centre regions to the near-wall regions is evident. Meanwhile, there is no distinct relationship between the number concentration and inlet wind velocity.

Key words: number concentration, cylindrical particles, a three-dimensional model, interaction between cylindrical particles, numerical simulation

摘要： In this study, a three-dimensional model based on RANS, slender-body theory and Newton-Euler dynamics is established to study the number concentration, one of the most important fluidization characteristics of cylindrical particles. Also, the effects of interaction between cylindrical particles are taken into account by introducing the rigid collision dynamics. To validate the model, the fluidization experiments of cylindrical particles in a cold-state fluidized bed are carried out. The number concentration characteristics of cylindrical particles are obtained from computational fluid dynamics (CFD) simulation. It is found that cylindrical particles arriving at the exit of the riser the earliest come from the near-wall regions, the horizontal transfer of so many cylindrical particles from the radial centre regions to the near-wall regions is evident. Meanwhile, there is no distinct relationship between the number concentration and inlet wind velocity.

关键词: number concentration, cylindrical particles, a three-dimensional model, interaction between cylindrical particles, numerical simulation

CAI Jie, ZHAO Xiaobao, LI Qihe, YUAN Zhulin. Number Concentration of Cylindrical Particles in a Fluidized Bed[J]. Chin.J.Chem.Eng., 2013, 21(1): 94-103.

蔡杰, 赵孝保, 李奇贺, 袁竹林 . Number Concentration of Cylindrical Particles in a Fluidized Bed[J]. Chinese Journal of Chemical Engineering, 2013, 21(1): 94-103.

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Number Concentration of Cylindrical Particles in a Fluidized Bed

Number Concentration of Cylindrical Particles in a Fluidized Bed

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