Heat transfer correlation for film boiling in vertical upward flow

Lokanath Mohanta, Faruk A. Sohag, Fan Bill Cheung, Stephen M. Bajorek, Joseph M. Kelly, Kirk Tien, Chris L. Hoxie

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


There is no heat transfer correlation available in the Inverted Slug Film Boiling (ISFB) regime. In this study, a new correlation for film boiling in a vertical channel is proposed using a semi-empirical model. This correlation is applicable in the Inverted Annular Film Boiling (IAFB) heat transfer regime as well as ISFB heat transfer regime. A semi-empirical model is developed to establish the functional dependence of the Nusselt number on various controlling parameters. Test data obtained from the transient reflood tests carried out in a full length 7×7 vertical Rod Bundle Heat Transfer (RBHT) facility are used to develop the correlation. The predicted Nusselt number agrees within 15% with the RBHT data set and other data set available in the literature. This heat transfer correlation is applicable up to a void fraction of 90%, i.e., both in the IAFB and ISFB regimes. The proposed correlation is also applicable to a tube geometry using a modified coefficient in the correlation with an error less than 10%.

Original languageEnglish (US)
Pages (from-to)112-122
Number of pages11
JournalInternational Journal of Heat and Mass Transfer
StatePublished - Apr 1 2017

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes


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