Nucleate pool boiling on horizontal tubes: A convection-based correlation

K. Cornwell, S. D. Houston

Research output: Contribution to journalArticle

Abstract

Pool boiling on horizontal tubes leads to a bubbly flow layer around the lower periphery of the tube in which bubbles slide around the surface. Heat transfer is by enhanced liquid convection at the surface around the bubble and by rapid evaporation of a thin layer under the sliding bubble. Both these mechanisms are a function of the vapour flow rate and a correlation of the following form is developed: Nu = AF(p)Re0.67b Pr0.4. A is a function of the critical pressure alone, F(p) is a function of the reduced pressure alone and Reb is based on the mean vapour mass flux from the surface and the tube diameter. The correlation applies to water, refrigerants and organics boiling on tubes of 8-50 mm in diameter. Bearing in mind the wide scatter found in pool boiling experiments the correlation fits well with the available world data and is particularly suitable for use in equipment design calculations. © 1994.

Original languageEnglish
Pages (from-to)303-309
Number of pages7
JournalInternational Journal of Heat and Mass Transfer
Volume37
Issue numberSUPPL. 1
Publication statusPublished - Mar 1994

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