| 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)
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| Source Publication | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
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| 2018-11-01 | |
| Volume | 126Pages:118-127 |
| ISSN | 0017-9310 |
| Abstract | In 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. |
| Keyword | Thermocapillary convection Low Prandtl number fluid Surface heat dissipation Flow pattern transition Annular pool |
| DOI | 10.1016/j.ijheatmasstransfer.2018.05.120 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000442972700011 |
| WOS Keyword | HORIZONTAL TEMPERATURE-GRADIENT ; OPEN CYLINDRICAL ANNULI ; LIQUID LAYERS ; MARANGONI CONVECTION ; BINARY-MIXTURE ; BUOYANCY FLOW ; INSTABILITIES ; CAVITY ; WAVES ; MICROGRAVITY |
| WOS Research Area | Thermodynamics ; Engineering, Mechanical ; Mechanics |
| WOS Subject | Thermodynamics ; Engineering ; Mechanics |
| Funding Organization | National Natural Science Foundation of China [51776022, 11532015] |
| Classification | 一类 |
| Ranking | 4 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/77930 |
| Collection | 微重力重点实验室 |
| Affiliation | 1.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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| IrJ2018318.pdf（3394KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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