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Numerical simulation of a bubble rising in shear-thinning fluids
Zhang, Li1,2; Yang, Chao1; Mao, Zai-Sha1; Mao, ZS
2010-06-01
Source PublicationJOURNAL OF NON-NEWTONIAN FLUID MECHANICS
ISSN0377-0257
Volume165Issue:11-12Pages:555-567
AbstractThe motion of a single bubble rising freely in quiescent non-Newtonian viscous fluids was investigated experimentally and computationally. The non-Newtonian effects in the flow of viscous inelastic fluids are modeled by the Carreau theological model. An improved level set approach for computing the incompressible two-phase flow with deformable free interface is used. The control volume formulation with the SIMPLEC algorithm incorporated is used to solve the governing equations on a staggered Eulerian grid. The simulation results demonstrate that the algorithm is robust for shear-thinning liquids with large density (rho(1)/rho(g) up to 10(3)) and high viscosity (eta(1)/eta(g) up to 10(4)). The comparison of the experimental measurements of terminal bubble shape and velocity with the computational results is satisfactory. It is shown that the local change in viscosity around a bubble greatly depends on the bubble shape and the zero-shear viscosity of non-Newtonian shear-thinning liquids. The shear-rate distribution and velocity fields are used to elucidate the formation of a region of large viscosity at the rear of a bubble as a result of the rather stagnant flow behind the bubble. The numerical results provide the basis for further investigations, such as the numerical simulation of viscoelastic fluids. (C) 2010 Elsevier B.V. All rights reserved.
KeywordNumerical Simulation Bubble Level Set Non-newtonian Liquid
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.jnnfm.2010.02.012
Indexed BySCI
Language英语
WOS KeywordLEVEL SET APPROACH ; MASS-TRANSFER ; COMPUTING SOLUTIONS ; RISE VELOCITY ; 2-PHASE FLOW ; LIQUIDS ; DROP ; SYSTEMS ; SPHERE ; MOTION
WOS Research AreaMechanics
WOS SubjectMechanics
WOS IDWOS:000278564300001
Citation statistics
Cited Times:50[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6139
Collection湿法冶金清洁生产技术国家工程实验室
Corresponding AuthorMao, ZS
Affiliation1.Chinese Acad Sci, Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Li,Yang, Chao,Mao, Zai-Sha,et al. Numerical simulation of a bubble rising in shear-thinning fluids[J]. JOURNAL OF NON-NEWTONIAN FLUID MECHANICS,2010,165(11-12):555-567.
APA Zhang, Li,Yang, Chao,Mao, Zai-Sha,&Mao, ZS.(2010).Numerical simulation of a bubble rising in shear-thinning fluids.JOURNAL OF NON-NEWTONIAN FLUID MECHANICS,165(11-12),555-567.
MLA Zhang, Li,et al."Numerical simulation of a bubble rising in shear-thinning fluids".JOURNAL OF NON-NEWTONIAN FLUID MECHANICS 165.11-12(2010):555-567.
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