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Numerical investigation of bubble dynamics and heat transfer in subcooling pool boiling under low gravity
Yi TH; Lei ZS; Zhao JF(赵建福)
Source PublicationINTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
2019-04-01
Volume132Pages:1176-1186
ISSN0017-9310
AbstractThe numerical simulation of a single vapor bubble growth in subcooling liquid under different gravity conditions has been carried out. In the numerical model, a thin superheated layer and the thermocapillary convection caused by the surface tension variation along the surface are considered. The continuity equation and energy equation are modified to allow for the phase change. In addition, the thermocapillary convection effect has been included in the momentum equation. The vapor-liquid interface is captured by the phase field method. The results show that the bubble behavior in the numerical model agrees well with previous experiments conducted in high subcooling liquid under microgravity. The effects of gravity level, contact angle and wall superheat on the bubble growth, critical subcooling (the liquid subcooling under the condition that the evaporation rate of a bubble is equal to its condensation rate The growth period and departure radius both reduce with the increase in gravity level, while the critical subcooling increases slightly. Large contact angle at the three-phase contact line augments the departure radius. However, the critical subcooling decreases as contact angle increases. With the wall superheat increasing, the growth period reduces rapidly, while the departure radius and the critical subcooling increase. What's more, the non departing bubble adhering to the surface would prevent heat transfer with a dry spot, which may damage the heating element in application. (C) 2018 Elsevier Ltd. All rights reserved.
KeywordBubble dynamics Subcooling boiling Critical subcooling Heat transfer Low gravity
DOI10.1016/j.ijheatmasstransfer.2018.12.096
Indexed BySCI ; EI
Language英语
WOS IDWOS:000458712300104
WOS KeywordSINGLE BUBBLE ; VAPOR BUBBLE ; NUCLEATE ; SIMULATION ; GROWTH ; NPBX ; WALL
WOS Research AreaThermodynamics ; Engineering, Mechanical ; Mechanics
WOS SubjectThermodynamics ; Engineering ; Mechanics
Funding OrganizationNational Natural Science Foundation of China [51274137, U1860107, U1738105]
Classification一类
Ranking3
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78231
Collection国家微重力实验室
Affiliation1.[Yi, Tian-Hao
2.Shanghai Univ, Sch Mat Sci & Engn, Shanghai Key Lab Adv Ferromet, State Key Lab Adv Special Steel, Shanghai 200072, Peoples R China
3.Chinese Acad Sci, Inst Mech, CAS Key Lab Micrograv, Beijing 100190, Peoples R China
4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Yi TH,Lei ZS,Zhao JF. Numerical investigation of bubble dynamics and heat transfer in subcooling pool boiling under low gravity[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2019,132:1176-1186.
APA Yi TH,Lei ZS,&赵建福.(2019).Numerical investigation of bubble dynamics and heat transfer in subcooling pool boiling under low gravity.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,132,1176-1186.
MLA Yi TH,et al."Numerical investigation of bubble dynamics and heat transfer in subcooling pool boiling under low gravity".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 132(2019):1176-1186.
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