CAS OpenIR
Coarse-grained CFD-DEM simulation to determine the multiscale characteristics of the air dense medium fluidized bed
Jia, Ying1,2; Zhang, Yong3,4; Xu, Ji3,4; Duan, Chenlong1,2; Zhao, Yuemin1,2; Ge, Wei3,4,5
2021-09-01
Source PublicationPOWDER TECHNOLOGY
ISSN0032-5910
Volume389Pages:270-277
AbstractCoal 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.
KeywordCoarse-grained CFD-DEM model Fluidization Pressure fluctuation Multiscale analysis Bed density
DOI10.1016/j.powtec.2021.05.014
Language英语
WOS KeywordDISCRETE PARTICLE SIMULATION ; GAS-SOLID FLOW ; NUMERICAL-SIMULATION ; WAVELET ANALYSIS ; KINETIC-THEORY ; MODEL ; BENEFICIATION ; SIZE ; SEGREGATION ; RESOLUTION
Funding ProjectNational 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 Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Natural Science Foundation of China ; China Postdoctoral Science Foundation
WOS IDWOS:000657318400002
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/49244
Collection中国科学院过程工程研究所
Corresponding AuthorZhang, Yong; Duan, Chenlong
Affiliation1.China Univ Min & Technol, Key Lab Coal Proc & Efficient Utilizat, Minist Educ, Xuzhou 221116, Jiangsu, Peoples R China
2.China Univ Min & Technol, Sch Chem Engn & Technol, Xuzhou 221116, Jiangsu, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
4.Chinese Acad Sci, Innovat Acad Green Manufacture, Beijing 100190, Peoples R China
5.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100190, Peoples R China
Recommended Citation
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.
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