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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
发表期刊PARTICUOLOGY
ISSN1674-2001
卷号27期号:AUG页码:95-101
摘要Local 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.
关键词Computational Fluid Dynamics External Loop Airlift Reactor Drag Model Gas Holdup Multiscale Mesoscale
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.partic.2015.05.011
收录类别SCI
语种英语
关键词[WOS]BUBBLE-SIZE DISTRIBUTION ; CHURN-TURBULENT REGIME ; CFD SIMULATION ; LIFT FORCE ; STABILITY CONDITION ; SLURRY REACTOR ; FLOW STRUCTURE ; EULERIAN SIMULATIONS ; COLUMN REACTORS ; VERTICAL PIPE
WOS研究方向Engineering ; Materials Science
WOS类目Engineering, Chemical ; Materials Science, Multidisciplinary
项目资助者National Natural Science Foundation of China(21222603 ; Ministry of Science and Technology of China(2013BAC12B01) ; Chinese Academy of Sciences(122111KYSB20150003 ; 91434121) ; XDA07080301)
WOS记录号WOS:000378959000011
引用统计
被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/21194
专题多相复杂系统国家重点实验室
作者单位1.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
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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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