CAS OpenIR  > 多相复杂系统国家重点实验室
A conceptual model for analyzing the stability condition and regime transition in bubble columns
Yang, Ning1; Chen, Jianhua1,2; Ge, Wei1; Li, Jinghai1; Yang, N
2010
Source PublicationCHEMICAL ENGINEERING SCIENCE
ISSN0009-2509
Volume65Issue:1Pages:517-526
AbstractThe abrupt change on the curve of gas holdup vs. superficial gas velocity calculated from the dual-bubble-size (DBS) model was physically interpreted as a shift from the homogeneous and transition regimes to the heterogeneous regime for bubble columns in our previous work (Yang et al., 2007. Explorations on the multi-scale flow structure and stability condition in bubble columns. Chem. Eng. Sci. 62,6978-6991). The fundamentals related to the DBS model and this jump change are further analyzed in this work. A conceptual analysis is performed on the momentum and energy transfer modes between phases and the partition of energy dissipation at different scales, thus the hydrodynamic equations can be closed with a stability condition formulated as a variational criterion, that is, the minimization of micro-scale energy dissipation or the maximization of meso-scale energy dissipation. Model calculation indicates that the stability condition drives the variation and evolution of structure parameters for the two bubble classes and hence causes the jump change of gas holdup which is due to the shift of the location of the global minimum point of the micro-scale energy dissipation from one ellipsoid of iso-surface to another in the 3D space of structure parameters. The stability condition brings about the compromise between small and large bubbles in that these two classes compete with each other to approach a critical diameter at which drag coefficient reaches minimum. For different liquid media, generally only one bubble class could jump to the critical diameter, except the critical state at which the roles of stabilizing and destabilizing flow reach a balance and the two bubble classes jump together to the critical diameter. This may offer a physical explanation on the dual effect of liquid viscosity and surface tension on flow stability and regime transition reported in literature, and the model calculation for this dual effect and the regime map is in reasonable agreement with experimental findings. (C) 2009 Elsevier Ltd. All rights reserved.
KeywordRegime Transition Bubble Column Stability Condition Multi-scale Gas-liquid Flow
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.ces.2009.06.014
Indexed BySCI ; ISTP
Language英语
WOS KeywordGAS-LIQUID FLOW ; 3-PHASE FLUIDIZED-BEDS ; COMPLEX-SYSTEMS ; 2-FLUID MODEL ; MASS-TRANSFER ; EMMS APPROACH ; REACTORS ; PRESSURE ; BREAKUP ; SIMULATION
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000276206700078
Citation statistics
Cited Times:55[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6231
Collection多相复杂系统国家重点实验室
Corresponding AuthorYang, N
Affiliation1.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Yang, Ning,Chen, Jianhua,Ge, Wei,et al. A conceptual model for analyzing the stability condition and regime transition in bubble columns[J]. CHEMICAL ENGINEERING SCIENCE,2010,65(1):517-526.
APA Yang, Ning,Chen, Jianhua,Ge, Wei,Li, Jinghai,&Yang, N.(2010).A conceptual model for analyzing the stability condition and regime transition in bubble columns.CHEMICAL ENGINEERING SCIENCE,65(1),517-526.
MLA Yang, Ning,et al."A conceptual model for analyzing the stability condition and regime transition in bubble columns".CHEMICAL ENGINEERING SCIENCE 65.1(2010):517-526.
Files in This Item:
File Name/Size DocType Version Access License
20131127-1346-复件 1-s(471KB) 限制开放CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Yang, Ning]'s Articles
[Chen, Jianhua]'s Articles
[Ge, Wei]'s Articles
Baidu academic
Similar articles in Baidu academic
[Yang, Ning]'s Articles
[Chen, Jianhua]'s Articles
[Ge, Wei]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Yang, Ning]'s Articles
[Chen, Jianhua]'s Articles
[Ge, Wei]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.