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Hydrodynamic equivalent diameter for clusters in heterogeneous gas-solid flow
Alternative TitleChem. Eng. Sci.
Xu, GW; Kato, K
1999-06-01
Source PublicationCHEMICAL ENGINEERING SCIENCE
ISSN0009-2509
Volume54Issue:12Pages:1837-1847
AbstractThis paper is devoted to establishing a simple correlation calculating the equivalent diameter of clusters in gas-solid how. Three different kinds of cluster sizes were distinguished in accordance with the measuring techniques: (1) vertical length measured with optical fiber or capacitance probes; (2) cross-sectional size determined with image analysis of graphs taken by video camera or other suitable detection systems; and (3) hydrodynamic equivalent diameter of clusters derived from differential pressure drop (solid concentration) via appropriate fluid dynamic models. The hydrodynamic equivalent cluster diameter correlated in hydrodynamic modeling was generalized as the diameter of spheres (uniform in size) having the same total volume as actual dusters (not a single cluster), which is subject to hydrodynamic equations, such as force balance, for clusters. It was demonstrated that hydrodynamic equivalent cluster diameter is close to cross-sectional size, but much less than vertical length of clusters experimentally measured. The correlation reported in Xu and Li (1998) (Chem. Engng Sci., vol. 63, p. 1349) was found to be capable of predicting hydrodynamic equivalent cluster diameters of heterogeneous gas-solid systems for both Geldart A and Geldart B particles, which was then further simplified for facilitating its practical use. (C) 1999 Elsevier Science Ltd. All rights reserved.; This paper is devoted to establishing a simple correlation calculating the equivalent diameter of clusters in gas-solid how. Three different kinds of cluster sizes were distinguished in accordance with the measuring techniques: (1) vertical length measured with optical fiber or capacitance probes; (2) cross-sectional size determined with image analysis of graphs taken by video camera or other suitable detection systems; and (3) hydrodynamic equivalent diameter of clusters derived from differential pressure drop (solid concentration) via appropriate fluid dynamic models. The hydrodynamic equivalent cluster diameter correlated in hydrodynamic modeling was generalized as the diameter of spheres (uniform in size) having the same total volume as actual dusters (not a single cluster), which is subject to hydrodynamic equations, such as force balance, for clusters. It was demonstrated that hydrodynamic equivalent cluster diameter is close to cross-sectional size, but much less than vertical length of clusters experimentally measured. The correlation reported in Xu and Li (1998) (Chem. Engng Sci., vol. 63, p. 1349) was found to be capable of predicting hydrodynamic equivalent cluster diameters of heterogeneous gas-solid systems for both Geldart A and Geldart B particles, which was then further simplified for facilitating its practical use. (C) 1999 Elsevier Science Ltd. All rights reserved.
KeywordGas-particle Flow Fluidization Multi-scale Analysis Cluster Modeling
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
URL查看原文
Indexed BySCI
Language英语
WOS KeywordCIRCULATING FLUIDIZED-BEDS ; VOIDAGE PROFILES ; BEHAVIOR ; CHOKING ; MODEL ; SIZE
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000080007600008
Citation statistics
Cited Times:35[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/5958
Collection研究所(批量导入)
Affiliation1.Acad Sinica, Inst Chem Met, Beijing 100080, Peoples R China
2.Gunma Univ, Dept Biol & Chem Engn, Kiryu, Gumma 3768515, Japan
Recommended Citation
GB/T 7714
Xu, GW,Kato, K. Hydrodynamic equivalent diameter for clusters in heterogeneous gas-solid flow[J]. CHEMICAL ENGINEERING SCIENCE,1999,54(12):1837-1847.
APA Xu, GW,&Kato, K.(1999).Hydrodynamic equivalent diameter for clusters in heterogeneous gas-solid flow.CHEMICAL ENGINEERING SCIENCE,54(12),1837-1847.
MLA Xu, GW,et al."Hydrodynamic equivalent diameter for clusters in heterogeneous gas-solid flow".CHEMICAL ENGINEERING SCIENCE 54.12(1999):1837-1847.
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