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Experiment on settling of slender particles with large aspect ratio and correlation of the drag coefficient
Alternative TitleInd. Eng. Chem. Res.
Fan, L; Mao, ZS; Yang, C
2004-11-10
Source PublicationINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN0888-5885
Volume43Issue:23Pages:7664-7670
AbstractThe drag coefficient of slender particles is an important parameter to operations involved with them. In this paper, settling of slender particles with a large aspect ratio and of different materials in laminar Newtonian fluids is studied. It is observed that the particle orientation oscillates during settling and stabilizes to its equilibrium horizontal orientation eventually. Experiments are conducted in different fluids (water and glycerin solutions, quiescent or flowing) for particles with different densities (from 1125 to 8000 kg(.)m(-3)) and aspect ratios (from 4 to 50). It is found that the product of the drag coefficient and cosine of the orientation angle is independent of the particle aspect ratio and the bulk liquid flow. Instead of using the concept of sphericity, the drag coefficient of slender particles is effectively correlated with the orientation and the Reynolds number based on the particle cylindrical diameter. With the aid of the modified Archimedes number, the proposed general correlation C-D cos phi = (24/Re)(0.006983 + 0.6224Re(-1.046))-(rho(p)/rho(l))(-1.537)(Ar*)(0.8524) represents very well the experimental data under various experimental conditions with the average relative error of 9.4%.; The drag coefficient of slender particles is an important parameter to operations involved with them. In this paper, settling of slender particles with a large aspect ratio and of different materials in laminar Newtonian fluids is studied. It is observed that the particle orientation oscillates during settling and stabilizes to its equilibrium horizontal orientation eventually. Experiments are conducted in different fluids (water and glycerin solutions, quiescent or flowing) for particles with different densities (from 1125 to 8000 kg(.)m(-3)) and aspect ratios (from 4 to 50). It is found that the product of the drag coefficient and cosine of the orientation angle is independent of the particle aspect ratio and the bulk liquid flow. Instead of using the concept of sphericity, the drag coefficient of slender particles is effectively correlated with the orientation and the Reynolds number based on the particle cylindrical diameter. With the aid of the modified Archimedes number, the proposed general correlation C-D cos phi = (24/Re)(0.006983 + 0.6224Re(-1.046))-(rho(p)/rho(l))(-1.537)(Ar*)(0.8524) represents very well the experimental data under various experimental conditions with the average relative error of 9.4%.
KeywordCylinders Sedimentation Spheres Fluids Flow
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1021/ie049479k
URL查看原文
Indexed BySCI
Language英语
WOS KeywordCYLINDERS ; SEDIMENTATION ; SPHERES ; FLUIDS ; FLOW
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000224977600050
Citation statistics
Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/4933
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China
2.Tsing Hua Univ, Dept Environm Sci & Engn, Beijing 100084, Peoples R China
Recommended Citation
GB/T 7714
Fan, L,Mao, ZS,Yang, C. Experiment on settling of slender particles with large aspect ratio and correlation of the drag coefficient[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2004,43(23):7664-7670.
APA Fan, L,Mao, ZS,&Yang, C.(2004).Experiment on settling of slender particles with large aspect ratio and correlation of the drag coefficient.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,43(23),7664-7670.
MLA Fan, L,et al."Experiment on settling of slender particles with large aspect ratio and correlation of the drag coefficient".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 43.23(2004):7664-7670.
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