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CFD simulations of tapered bubbling/turbulent fluidized beds with/without gas distributor based on the structure-based drag model
Zou, Zheng1; Liu, Wenming2; Yan, Dong1; Xie, Zhaohui1; Li, Hongzhong1,3; Zhu, Qingshan1,3; He, Shengyi4
2019-07-20
Source PublicationCHEMICAL ENGINEERING SCIENCE
ISSN0009-2509
Volume202Pages:157-168
AbstractThe hydrodynamic characteristics of tapered bubbling/turbulent fluidized beds with/without gas distributor are simulated based on the structure-based drag model. Besides the only parameter of gas voidage (epsilon(g)) contained in the original drag model, the heterogeneous drag index (H-d) for the tapered fluidized bed (TFB) also includes the parameter of gas velocity (u(g)) for the axial velocity gradient along bed height. Both the simulations of tapered bubbling and turbulent fluidized beds achieve more accurate predictions than the traditional drag models. There exist dilute center and dense annular regions with solids cycle flow structure in the TFB. The simulation also gives reasonable prediction for TFB without gas distributor, the variation of gas voidage profile reveals gas converging toward bed center with axial location rising. (C) 2019 Elsevier Ltd. All rights reserved.
KeywordFluidization Tapered fluidized bed CFD The structure-based drag model
DOI10.1016/j.ces.2019.03.034
Language英语
WOS KeywordSOLID FLOW ; HYDRODYNAMIC CHARACTERISTICS ; FRICTIONAL STRESS ; SPOUTED BED ; PARTICLES ; SEGREGATION ; COEFFICIENT ; PENETRATION ; BEHAVIOR ; JET
Funding ProjectNational Natural Science Foundation of China[21736010] ; National Natural Science Foundation of China[21878304] ; State Key Development Program for Basic Research of China (973 Program)[2015CB251402]
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Natural Science Foundation of China ; State Key Development Program for Basic Research of China (973 Program)
WOS IDWOS:000463879900015
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/28136
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, POB 353, Beijing 100190, Peoples R China
2.SINOPEC, Res Inst Petr Proc, Beijing 100083, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.BOE Technol Grp Co Ltd, Beijing 100016, Peoples R China
Recommended Citation
GB/T 7714
Zou, Zheng,Liu, Wenming,Yan, Dong,et al. CFD simulations of tapered bubbling/turbulent fluidized beds with/without gas distributor based on the structure-based drag model[J]. CHEMICAL ENGINEERING SCIENCE,2019,202:157-168.
APA Zou, Zheng.,Liu, Wenming.,Yan, Dong.,Xie, Zhaohui.,Li, Hongzhong.,...&He, Shengyi.(2019).CFD simulations of tapered bubbling/turbulent fluidized beds with/without gas distributor based on the structure-based drag model.CHEMICAL ENGINEERING SCIENCE,202,157-168.
MLA Zou, Zheng,et al."CFD simulations of tapered bubbling/turbulent fluidized beds with/without gas distributor based on the structure-based drag model".CHEMICAL ENGINEERING SCIENCE 202(2019):157-168.
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