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Hydrodynamic Modeling of Gas-Solid Bubbling Fluidization Based on Energy-Minimization Multiscale (EMMS) Theory
Alternative TitleInd. Eng. Chem. Res.
Liu, Xinhua1; Jiang, Yuefang1,2; Liu, Cenfan1; Wang, Wei1; Li, Jinghai1
2014-02-19
Source PublicationINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN0888-5885
Volume53Issue:7Pages:2800-2810
AbstractHydrodynamic modeling of gas-solid bubbling fluidization is of significance to the development of gas-solid bubbling reactors since it still remains at the stage of experimental and empirical science. As is the role of particle clusters in gas solid fast fluidization, gas bubbles characterize the structural heterogeneity of gas-solid bubbling fluidization, and their evolution is mainly subject to the constraints of the stability and boundary conditions of the system. By considering the expansion work of gas bubbles against the normal pressure stress in the emulsion phase, an improved necessary stability condition is proposed to close a gas-solid bubbling model. Applying the upgraded gas-solid bubbling model at the scale of vessels, the steady-state hydrodynamics of gas-solid bubbling fluidization can be reproduced without introducing bubble-specific empirical correlations such as for diameter and/or acceleration. The unified modeling of the entire gas-solid fluidization regime from bubbling to fast fluidization is performed by integrating the upgraded gas-solid bubbling model with the original energy-minimization multiscale (EMMS) model. Incorporating the upgraded gas-solid bubbling model into commercial computational fluid dynamics (CFD) software at the scale of computational cells, the unsteady-state simulation of gas-solid bubbling fluidization is realized with a higher accuracy than that based on homogeneous drag models.; Hydrodynamic modeling of gas-solid bubbling fluidization is of significance to the development of gas-solid bubbling reactors since it still remains at the stage of experimental and empirical science. As is the role of particle clusters in gas solid fast fluidization, gas bubbles characterize the structural heterogeneity of gas-solid bubbling fluidization, and their evolution is mainly subject to the constraints of the stability and boundary conditions of the system. By considering the expansion work of gas bubbles against the normal pressure stress in the emulsion phase, an improved necessary stability condition is proposed to close a gas-solid bubbling model. Applying the upgraded gas-solid bubbling model at the scale of vessels, the steady-state hydrodynamics of gas-solid bubbling fluidization can be reproduced without introducing bubble-specific empirical correlations such as for diameter and/or acceleration. The unified modeling of the entire gas-solid fluidization regime from bubbling to fast fluidization is performed by integrating the upgraded gas-solid bubbling model with the original energy-minimization multiscale (EMMS) model. Incorporating the upgraded gas-solid bubbling model into commercial computational fluid dynamics (CFD) software at the scale of computational cells, the unsteady-state simulation of gas-solid bubbling fluidization is realized with a higher accuracy than that based on homogeneous drag models.
KeywordDrag Coefficient Fine Powders Dense Phase Beds Flow Simulation Pressure Cfd Particles Diameter
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1021/ie4029335
URL查看原文
Indexed BySCI
Language英语
WOS KeywordDRAG COEFFICIENT ; FINE POWDERS ; DENSE PHASE ; BEDS ; FLOW ; SIMULATION ; PRESSURE ; CFD ; PARTICLES ; DIAMETER
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000332262000028
Citation statistics
Cited Times:33[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/8117
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.China Univ Petr, State Key Lab Heavy Oil Proc, Qingdao 266555, Peoples R China
Recommended Citation
GB/T 7714
Liu, Xinhua,Jiang, Yuefang,Liu, Cenfan,et al. Hydrodynamic Modeling of Gas-Solid Bubbling Fluidization Based on Energy-Minimization Multiscale (EMMS) Theory[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2014,53(7):2800-2810.
APA Liu, Xinhua,Jiang, Yuefang,Liu, Cenfan,Wang, Wei,&Li, Jinghai.(2014).Hydrodynamic Modeling of Gas-Solid Bubbling Fluidization Based on Energy-Minimization Multiscale (EMMS) Theory.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,53(7),2800-2810.
MLA Liu, Xinhua,et al."Hydrodynamic Modeling of Gas-Solid Bubbling Fluidization Based on Energy-Minimization Multiscale (EMMS) Theory".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 53.7(2014):2800-2810.
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