Enhanced nucleate boiling from two cylinders in line contact

M. C. Chyu, A. M. Mghamis

Research output: Contribution to journalConference articlepeer-review


Nucleate boiling from the restricted geometry between two cylinders in line contact was studied. Pool boiling experiment was conducted using water and two small-diameter tubes brought together through either twisting or tying. It was found that nucleate boiling is significantly enhanced in the restricted regions between the two tubes, particularly in those with openings facing upward. This is due to a favorable thermal environment provided by the combination of the restricted geometry, and a relatively uniform temperature profile. A theoretical analysis was conducted with regard to this phenomenon. Data of different tube orientations are discussed to support this analysis. This study provides important information for the design of a high performance boiling heat transfer surface.

Original languageEnglish
Pages (from-to)81-86
Number of pages6
JournalAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
StatePublished - 1989
EventMultiphase Flow, Heat and Mass Transfer - Presented at the 1989 National Heat Transfer Conference - Philadelphia, PA, USA
Duration: Aug 6 1989Aug 9 1989


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