Numerical Study of the Orientation of Cylindrical Particles in a Circulating Fluidized Bed

被引：14
|
作者：
Cai, Jie [1 ,2 ,3 ]
Peng, Zhengbiao [4 ]
Wu, Charley [3 ]
Zhao, Xiaobao [2 ]
Yuan, Zhulin [1 ]
Moghtaderi, Behdad [4 ]
Doroodchi, Elham [4 ]
机构：
[1] Southeast Univ, Sch Energy & Environm, Nanjing 210096, Jiangsu, Peoples R China
[2] Nanjing Normal Univ, Sch Energy & Mech Engn, Nanjing 210042, Jiangsu, Peoples R China
[3] Univ Surrey, Dept Chem & Proc Engn, Guildford GU2 7XH, Surrey, England
[4] Univ Newcastle, Sch Engn, Discipline Chem Engn, Univ Dr, Callaghan, NSW 2308, Australia
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2016年 / 55卷 / 50期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
ELLIPSOIDAL PARTICLES; SLENDER PARTICLES; FLOW; SIMULATION; MOTION; TURBULENCE; BREAKAGE; DYNAMICS; FIBER; PIPE;
D O I：
10.1021/acs.iecr.6b04022
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Orientation is pivotal in circulating fluidized beds using cylinder-shaped particles. This study developed a three-dimensional multiway coupling model for predicting the orientation of cylindrical particles in circulating fluidized beds. The coupling algorithm between motorial cylindrical particles and the turbulence was established by incorporating the correlation between Lagrangian time scales and the k-epsilon model. Collisions among cylindrical particles were solved by combining rigid body impact dynamics with the hard sphere model. The results showed that the majority of cylindrical particles are prone to align with the streamline, which is in good agreement with the experimental observation. Cylindrical particles become more oriented along rising height position in the riser, increasing the slenderness ratio and decreasing the distance to the wall. Under turbulence conditions, the effect of Reynolds number on the orientation of cylindrical particles was found to be marginal.
引用
收藏
页码：12806 / 12817
页数：12
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