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Heat transfer from a horizontal smooth tube to a laminar falling film
Author(s) -
MitroviC J.
Publication year - 1986
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450640622
Subject(s) - laminar flow , falling (accident) , tube (container) , heat transfer , mechanics , boundary layer , heat transfer coefficient , thermodynamics , materials science , flow (mathematics) , physics , composite material , medicine , environmental health
For the case in which the liquid, freely falling between two adjacent horizontal tubes, forms a liquid sheet, Rogers (1981) gave an analysis of the heat transfer from the tube to the liquid. The flow within the film was assumed to be laminar. Some of the results obtained by Rogers are extended and discussed in the present paper. In particular, a simple relation is given for the angle θ d , at which the thermal boundary layer intersects the film surface. This relation provides an easy means for calculation of the heat transfer coefficient and for determination of the range of parameters in which Rogers' analysis is applicable.