CAS OpenIR
CFD simulation of solids residence time distribution for scaling up gas-solid bubbling fluidized bed reactors based on the modified structure-based drag model
Zhao, Yunlong1,2; Zou, Zheng1,2; Wang, Junwu1,2; Li, Hongzhong1,2; Zhu, Qingshan1,2
2020-11-03
Source PublicationCANADIAN JOURNAL OF CHEMICAL ENGINEERING
ISSN0008-4034
Pages12
AbstractSolids residence time distribution (RTD), which reflects the degree of solids mixing in bubbling fluidized bed (BFB), has become an essential parameter for the evaluation of reactor performances. In this paper, a modified structure-based drag model was established to investigate the effect of the bed size and the correlation of bubble dimension on the gas-solids hydrodynamics and solids RTD in three different scales of BFB. The result obtained from the modified structure-based drag model shows better agreement with the experimental values and it can be used to predict the RTD properly. The deviation of flow field will cause a large difference in the RTD prediction. An accurate flow field is a prerequisite for calculating the RTD. For the cases of Geldart B particles, the Darton correlation is the best choice for low gas velocities. When scaling up a BFB, the RTD calculated by the modified structure-based drag model is reduced in comparison with the experimental value, which is related to the increase of the bed size and the excessive estimation of the bubble size. On the other hand, the lack of consideration for the friction on both front and back walls in 2D simulation may lead to the over-prediction of particle velocity and result in the deviation between calculated and experimental RTD value.
KeywordBFB computational fluid dynamics fluidization residence time distribution scale-up
DOI10.1002/cjce.23882
Language英语
WOS Keyword2-FLUID MODEL ; FLOW ; SIZE ; PARTICLES ; FREQUENCY ; VERIFICATION ; GELDART
Funding ProjectFund of State Key Laboratory of Multiphase complex systems[MPCS-2019-A-07] ; National Natural Science Foundation of China[21736010] ; National Natural Science Foundation of China[21878304] ; Science Fund for Creative Research Groups[21921005]
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationFund of State Key Laboratory of Multiphase complex systems ; National Natural Science Foundation of China ; Science Fund for Creative Research Groups
WOS IDWOS:000584146300001
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/42527
Collection中国科学院过程工程研究所
Corresponding AuthorLi, Hongzhong; Zhu, Qingshan
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Yunlong,Zou, Zheng,Wang, Junwu,et al. CFD simulation of solids residence time distribution for scaling up gas-solid bubbling fluidized bed reactors based on the modified structure-based drag model[J]. CANADIAN JOURNAL OF CHEMICAL ENGINEERING,2020:12.
APA Zhao, Yunlong,Zou, Zheng,Wang, Junwu,Li, Hongzhong,&Zhu, Qingshan.(2020).CFD simulation of solids residence time distribution for scaling up gas-solid bubbling fluidized bed reactors based on the modified structure-based drag model.CANADIAN JOURNAL OF CHEMICAL ENGINEERING,12.
MLA Zhao, Yunlong,et al."CFD simulation of solids residence time distribution for scaling up gas-solid bubbling fluidized bed reactors based on the modified structure-based drag model".CANADIAN JOURNAL OF CHEMICAL ENGINEERING (2020):12.
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