Coarse-grained CFD-DEM simulation to determine the multiscale characteristics of the air dense medium fluidized bed
文献类型：期刊论文
| 作者 | Jia, Ying3,4; Zhang, Yong1,5 ; Xu, Ji1,5; Duan, Chenlong3,4; Zhao, Yuemin3,4; Ge, Wei1,2,5
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| 刊名 | POWDER TECHNOLOGY
 |
| 出版日期 | 2021-09-01 |
| 卷号 | 389页码:270-277 |
| 关键词 | Coarse-grained CFD-DEM model Fluidization Pressure fluctuation Multiscale analysis Bed density |
| ISSN号 | 0032-5910 |
| DOI | 10.1016/j.powtec.2021.05.014 |
| 英文摘要 | Coal beneficiation via the air dense medium fluidized bed (ADMFB) has increased its popularity in recent de-cades. However, due to the coexistence of bubbles and the emulsion phases, obtaining a uniform and stable bed density for coal separation in ADMFB remains challenging. In this work, a coarse-grained CFD-DEM method with high accuracy in capturing the macroscale behaviors of the bed expansion rates and the axial solid concen-tration, was tested and validated. Besides, the microscale and mesoscale behaviors of the ADMFB were also ana-lyzed via power spectrum density and wavelet decomposition. The findings show that the pressure fluctuation mainly results from bubbles motion of mesoscale rather than from particles motion of microscale and global bed expansion of macroscale. Furthermore, the apparent densities at different scales were calculated and a stable and uniform separation density was obtained within appropriate domains where the coal separation efficiency could be ensured. (c) 2021 Elsevier B.V. All rights reserved. |
| WOS关键词 | DISCRETE PARTICLE SIMULATION ; GAS-SOLID FLOW ; NUMERICAL-SIMULATION ; WAVELET ANALYSIS ; KINETIC-THEORY ; MODEL ; BENEFICIATION ; SIZE ; SEGREGATION ; RESOLUTION |
| 资助项目 | National Natural Science Foundation of China[22008239] ; National Natural Science Foundation of China[U1903132] ; National Natural Science Foundation of China[22078330] ; China Postdoctoral Science Foundation[2019M660796] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000657318400002 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; China Postdoctoral Science Foundation |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/49243]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Zhang, Yong; Duan, Chenlong |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100190, Peoples R China 3.China Univ Min & Technol, Key Lab Coal Proc & Efficient Utilizat, Minist Educ, Xuzhou 221116, Jiangsu, Peoples R China 4.China Univ Min & Technol, Sch Chem Engn & Technol, Xuzhou 221116, Jiangsu, Peoples R China 5.Chinese Acad Sci, Innovat Acad Green Manufacture, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jia, Ying,Zhang, Yong,Xu, Ji,et al. Coarse-grained CFD-DEM simulation to determine the multiscale characteristics of the air dense medium fluidized bed[J]. POWDER TECHNOLOGY,2021,389:270-277. |
| APA | Jia, Ying,Zhang, Yong,Xu, Ji,Duan, Chenlong,Zhao, Yuemin,&Ge, Wei.(2021).Coarse-grained CFD-DEM simulation to determine the multiscale characteristics of the air dense medium fluidized bed.POWDER TECHNOLOGY,389,270-277. |
| MLA | Jia, Ying,et al."Coarse-grained CFD-DEM simulation to determine the multiscale characteristics of the air dense medium fluidized bed".POWDER TECHNOLOGY 389(2021):270-277. |
入库方式： OAI收割
来源：过程工程研究所
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