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Computational fluid dynamics simulation of hydrodynamics in the riser of an external loop airlift reactor
Jiang, Xuedong1,2,3; Yang, Ning2,3; Yang, Bolun1
2016-08-01
Source PublicationPARTICUOLOGY
ISSN1674-2001
Volume27Issue:AUGPages:95-101
AbstractLocal hydrodynamics in the riser of an external loop airlift reactor (EL-ALR) are identified and the performances of three drag models are evaluated in computational fluid dynamics simulation. The simulation results show that the Schiller-Naumann drag model underestimated the local gas holdup at lower superficial gas velocity whereas the Tomiyama drag model overestimated that at higher superficial gas velocity. By contrast, the dual-bubble-size (DBS)-local drag model gave more reasonable radial and axial distributions of gas holdup in all cases. The reason is that the DBS-local drag model gave correct values of the lumped parameter, i.e., the ratio of the drag coefficient to bubble diameter, for varying operating conditions and radial positions. This ratio is reasonably expected to decrease with increasing superficial gas velocity and be smaller in the center and larger near the wall. Only the DBS-local drag model correctly reproduced these trends. The radial profiles of the axial velocity of the liquid and gas predicted by the DBS-local model also agreed well with experimental data. (C) 2015 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
KeywordComputational Fluid Dynamics External Loop Airlift Reactor Drag Model Gas Holdup Multiscale Mesoscale
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.partic.2015.05.011
Indexed BySCI
Language英语
WOS KeywordBUBBLE-SIZE DISTRIBUTION ; CHURN-TURBULENT REGIME ; CFD SIMULATION ; LIFT FORCE ; STABILITY CONDITION ; SLURRY REACTOR ; FLOW STRUCTURE ; EULERIAN SIMULATIONS ; COLUMN REACTORS ; VERTICAL PIPE
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Chemical ; Materials Science, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China(21222603 ; Ministry of Science and Technology of China(2013BAC12B01) ; Chinese Academy of Sciences(122111KYSB20150003 ; 91434121) ; XDA07080301)
WOS IDWOS:000378959000011
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21194
Collection多相复杂系统国家重点实验室
Affiliation1.Xi An Jiao Tong Univ, Dept Chem Engn, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China
2.Chinese Acad Sci, Ctr Mesosci, Beijing 100190, Peoples R China
3.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Jiang, Xuedong,Yang, Ning,Yang, Bolun. Computational fluid dynamics simulation of hydrodynamics in the riser of an external loop airlift reactor[J]. PARTICUOLOGY,2016,27(AUG):95-101.
APA Jiang, Xuedong,Yang, Ning,&Yang, Bolun.(2016).Computational fluid dynamics simulation of hydrodynamics in the riser of an external loop airlift reactor.PARTICUOLOGY,27(AUG),95-101.
MLA Jiang, Xuedong,et al."Computational fluid dynamics simulation of hydrodynamics in the riser of an external loop airlift reactor".PARTICUOLOGY 27.AUG(2016):95-101.
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