Numerical investigation of a coarse-grain discrete element method in solid mixing in a spouted bed

被引:108
作者
Takabatake, Kazuya [1 ]
Mori, Yuki [1 ]
Khinast, Johannes G. [2 ]
Sakai, Mikio [3 ]
机构
[1] Univ Tokyo, Dept Nucl Engn & Management, Sch Engn, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan
[2] Graz Univ Technol, Inst Proc & Particle Engn, Inffeldg 13, Graz, Austria
[3] Univ Tokyo, Sch Engn, Resilience Engn Res Ctr, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan
基金
日本学术振兴会;
关键词
Discrete element method; DEM-CFD method; Coarse-grain model; Spouted bed; FLUIDIZED-BED; CFD-DEM; PARTICLE SIMULATION; CYLINDRICAL TANK; FLOW; MODEL; VALIDATION; SYSTEMS;
D O I
10.1016/j.cej.2018.04.015
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
We describe the effectiveness of the coarse-grain model of the discrete element method (DEM) in solid mixing in a spouted bed. The coarse-grain model was developed originally to simulate large-scale DEM simulations efficiently, where the coarse-grain particle represents a group of original particles. In previous studies, the adequacy of the coarse-grain model was proven in a pneumatic conveying system and bubbling fluidized beds through verification and validation tests. Namely, In this study, the coarse-grain model is applied to solid mixing in a spouted bed. Agreement of the mixing state is shown between an original particle system and coarse grain model systems. Subsequently, correlation between solid mixing and macroscopic behavior of the solid particles is examined in the present study. The macroscopic properties such as solid-particle spatial distribution, pressure drop and velocity distribution of the solid phase are confirmed to correspond quantitatively in the coarse-grain model and an original particle system. Finally, the calculation efficiency of the coarse-grain model is evaluated. Consequently, the coarse-grain model is shown to be able to efficiently investigate the solid mixing in a spouted bed.
引用
收藏
页码:416 / 426
页数:11
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