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Transition and film boiling from horizontal strips
Author(s) -
Kesselring R. C.,
Rosche P. H.,
Bankoff S. G.
Publication year - 1967
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690130415
Subject(s) - boiling , heat flux , turbulence , freon , strips , heat transfer , nucleate boiling , mechanics , flux (metallurgy) , thermodynamics , bubble , materials science , leidenfrost effect , range (aeronautics) , optics , chemistry , composite material , physics , metallurgy
Measurements of heat flux and surface temperature fluctuations are reported for transition and film boiling of Freon 113 from flattened horizontal stainless steel tubes. The strip width is found to have a definite effect upon the heat flux in the film boiling regime. Photographic measurements indicate the absence of any appreciable long‐range periodicities, from which it is inferred that random turbulent effects are quite important. Also, a spectrum of bubble diameter, frequencies, and spacings is observed. On the other hand, some short‐time spatial periodicities were observed, and the theoretical values of the parameters fell well within the experimental range. Based upon the photographic and heat transfer measurements, a recommended expression for the minimum heat flux was developed.