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Correlations for prediction of the bubble departure radius on smooth flat surface during nucleate pool boiling

Wang, Xueli LU ; Wu, Zan LU ; Wei, Jinjia and Sundén, Bengt LU (2019) In International Journal of Heat and Mass Transfer 132. p.699-714
Abstract

Based on a modified force balance model, new correlations were proposed for the prediction of vapor bubble departure radius in saturated and subcooled pool boiling under atmospheric pressure. To predict the departure radius, the wall temperature and contact angle are two important input parameters. Instead of the static contact angle, the present correlations use the dynamic advancing contact angle at root of the bubble base at the moment before bubble detachment (i.e., the maximum dynamic advancing contact angle) to calculate the bubble departure radius. The results show that for the bubble departure radius obtained in this study, the developed correlation can predict all the data points within a maximum error of 3.8% in both normal... (More)

Based on a modified force balance model, new correlations were proposed for the prediction of vapor bubble departure radius in saturated and subcooled pool boiling under atmospheric pressure. To predict the departure radius, the wall temperature and contact angle are two important input parameters. Instead of the static contact angle, the present correlations use the dynamic advancing contact angle at root of the bubble base at the moment before bubble detachment (i.e., the maximum dynamic advancing contact angle) to calculate the bubble departure radius. The results show that for the bubble departure radius obtained in this study, the developed correlation can predict all the data points within a maximum error of 3.8% in both normal earth gravity and 0.01ge reduced gravity. Moreover, for data sets in the literature including 1g saturated boiling, 1g subcooled boiling, saturated boiling in reduced gravity, and subcooled boiling in reduced gravity, it is also demonstrated that compared with the thirteen existing correlations, the proposed correlations exhibit a big improvement in predicting bubble departure radius.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Bubble departure radius correlation, Dynamic advancing contact angle, Pool boiling, Reduced gravity, Subcooled boiling
in
International Journal of Heat and Mass Transfer
volume
132
pages
16 pages
publisher
Pergamon
external identifiers
  • scopus:85058212160
ISSN
0017-9310
DOI
10.1016/j.ijheatmasstransfer.2018.12.029
language
English
LU publication?
yes
id
57c6d362-8509-4224-b911-8e85305011d6
date added to LUP
2019-01-02 11:14:49
date last changed
2019-01-02 11:14:49
@article{57c6d362-8509-4224-b911-8e85305011d6,
  abstract     = {<p>Based on a modified force balance model, new correlations were proposed for the prediction of vapor bubble departure radius in saturated and subcooled pool boiling under atmospheric pressure. To predict the departure radius, the wall temperature and contact angle are two important input parameters. Instead of the static contact angle, the present correlations use the dynamic advancing contact angle at root of the bubble base at the moment before bubble detachment (i.e., the maximum dynamic advancing contact angle) to calculate the bubble departure radius. The results show that for the bubble departure radius obtained in this study, the developed correlation can predict all the data points within a maximum error of 3.8% in both normal earth gravity and 0.01g<sub>e</sub> reduced gravity. Moreover, for data sets in the literature including 1g saturated boiling, 1g subcooled boiling, saturated boiling in reduced gravity, and subcooled boiling in reduced gravity, it is also demonstrated that compared with the thirteen existing correlations, the proposed correlations exhibit a big improvement in predicting bubble departure radius.</p>},
  author       = {Wang, Xueli and Wu, Zan and Wei, Jinjia and Sundén, Bengt},
  issn         = {0017-9310},
  keyword      = {Bubble departure radius correlation,Dynamic advancing contact angle,Pool boiling,Reduced gravity,Subcooled boiling},
  language     = {eng},
  month        = {04},
  pages        = {699--714},
  publisher    = {Pergamon},
  series       = {International Journal of Heat and Mass Transfer},
  title        = {Correlations for prediction of the bubble departure radius on smooth flat surface during nucleate pool boiling},
  url          = {http://dx.doi.org/10.1016/j.ijheatmasstransfer.2018.12.029},
  volume       = {132},
  year         = {2019},
}