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Bubble dynamics in nucleate pool boiling on micro-pin-finned surfaces in microgravity
Zhang YH; Wei JJ; Xue YF; Kong X; Zhao JF(赵建福); Wei, JJ (reprint author), Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China.
Source PublicationAPPLIED THERMAL ENGINEERING
2014-09-05
Volume70Issue:1Pages:172-182
ISSN1359-4311
AbstractBubble dynamics is an important phenomenon, which basically affects the nucleate boiling heat transfer coefficient. Nucleate boiling heat transfer of gas-saturated FC-72 on micro-pin-finned surface was experimentally investigated in microgravity environment by utilizing the drop tower facility in Beijing. The dimensions of the silicon chips were 10 mm x 10 mm x 0.5 mm (length x width x thickness) on which two kinds of micro-pin-fins with the dimensions of 30 x 30 x 60 mu m(3), 50 x 50 x 120 mu m(3) (width x thickness x height, named PF30-60, PF50-120) were fabricated by the dry etching technique. The experimental data were presented for the bubble departure radius on micro-pin-finned surface. Experimental results showed that the bubble detachment radius increases with increasing heat flux, but the traditional force balance model failed to predict the bubble detachment radius on micro-pin-finned surfaces especially at high heat fluxes. Therefore, a new modified model for predicting bubble departure radius on micro-pin-finned surface in microgravity was developed. In this model, both bubble force balance and bubble coalescence are considered as two main factors influencing the size of bubble departure radius, and the predictions agree much better with the experimental data at moderate and high heat fluxes than the force balance model. (C) 2014 Elsevier Ltd. All rights reserved.
KeywordHeat-transfer Silicon Chips Fc-72 Departure Fins
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000341464400019
Funding OrganizationThis work is supported by the project of National Natural Science Foundation of China (no. 51225601) and the Key Laboratory of Microgravity/CAS for experiments utilizing the drop tower Beijing.
DepartmentNML微重力两相流与燃烧
Classification一类
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/49144
Collection国家微重力实验室
Corresponding AuthorWei, JJ (reprint author), Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China.
Recommended Citation
GB/T 7714
Zhang YH,Wei JJ,Xue YF,et al. Bubble dynamics in nucleate pool boiling on micro-pin-finned surfaces in microgravity[J]. APPLIED THERMAL ENGINEERING,2014,70(1):172-182.
APA Zhang YH,Wei JJ,Xue YF,Kong X,赵建福,&Wei, JJ .(2014).Bubble dynamics in nucleate pool boiling on micro-pin-finned surfaces in microgravity.APPLIED THERMAL ENGINEERING,70(1),172-182.
MLA Zhang YH,et al."Bubble dynamics in nucleate pool boiling on micro-pin-finned surfaces in microgravity".APPLIED THERMAL ENGINEERING 70.1(2014):172-182.
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