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Flow pattern transition and destabilization mechanism of thermocapillary convection for low Prandtl number fluid in a deep annular pool with surface heat dissipation
Zhang L; Li YR; Wu CM; Liu QS(刘秋生)
Source PublicationINTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
2018-11-01
Volume126Pages:118-127
ISSN0017-9310
AbstractIn order to understand clearly the flow pattern transition and the destabilization mechanism of thermocapillary convection for low Prandtl number fluids in a deep annular pool with surface heat dissipation, we carried out a series of three-dimensional numerical simulations by using the finite volume method. The radius ratio and the aspect ratio of an annular pool are respectively fixed at 0.5 and 1.0. Prandtl number of the working fluid is 0.011. Because the total heat dissipation coefficient on the free surface for low Prandtl fluids is small, Biot number is varied from 0 to 1.0. Results indicate that thermocapillary convection experiences the transitions from axisymmetric steady state flow into three dimensional steady flow and then into three-dimensional oscillation flow with the increase of Marangoni number. The critical Marangoni number of flow pattern transition decreases slightly with the increase of Biot number, and the maximum temperature and velocity fluctuations appear near the lower part of outer wall. The azimuthal temperature fluctuation on the free surface gradually shrinks to the inner wall, and the temperature fluctuation region decreases. However, it remains almost unchanged near the bottom of the annular pool, but the fluctuation amplitude increases. (C) 2018 Elsevier Ltd. All rights reserved.
KeywordThermocapillary convection Low Prandtl number fluid Surface heat dissipation Flow pattern transition Annular pool
DOI10.1016/j.ijheatmasstransfer.2018.05.120
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000442972700011
WOS KeywordHORIZONTAL TEMPERATURE-GRADIENT ; OPEN CYLINDRICAL ANNULI ; LIQUID LAYERS ; MARANGONI CONVECTION ; BINARY-MIXTURE ; BUOYANCY FLOW ; INSTABILITIES ; CAVITY ; WAVES ; MICROGRAVITY
WOS Research AreaThermodynamics ; Engineering, Mechanical ; Mechanics
WOS SubjectThermodynamics ; Engineering ; Mechanics
Funding OrganizationNational Natural Science Foundation of China [51776022, 11532015]
Classification一类
Ranking4
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/77930
Collection国家微重力实验室
Affiliation1.Chongqing Univ, Coll Power Engn, Key Lab Low Grade Energy Utilizat Technol & Syst, Minist Educ, Chongqing 400044, Peoples R China
2.Sichuan Int Studies Univ, Chongqing Nanfang Translators Coll, Chongqing 401120, Peoples R China
3.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Natl Micrograv Lab, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Zhang L,Li YR,Wu CM,et al. Flow pattern transition and destabilization mechanism of thermocapillary convection for low Prandtl number fluid in a deep annular pool with surface heat dissipation[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2018,126:118-127.
APA Zhang L,Li YR,Wu CM,&刘秋生.(2018).Flow pattern transition and destabilization mechanism of thermocapillary convection for low Prandtl number fluid in a deep annular pool with surface heat dissipation.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,126,118-127.
MLA Zhang L,et al."Flow pattern transition and destabilization mechanism of thermocapillary convection for low Prandtl number fluid in a deep annular pool with surface heat dissipation".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 126(2018):118-127.
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