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A THEORY OF HEAT TRANSFER BY DROPWISE CONDENSATION

E. J. Le Fevre
Queen Mary College, University of London

John W. Rose
School of Engineering and Materials Science, Queen Mary, University of London, London E1 4NS, UK

Abstract

The paper presents a new theory of heat-transfer by dropwise condensation in the absence of non-condensing gases. The authors consider the heat-transfer arising from condensation on a single drop, and by means of an assumed distribution of drop sizes, deduce the mean heat-transfer rate for the whole surface. The three principal physical phenomena considered in the evaluation of the heat-transfer through a single drop are:
(1) The effect of surface tension on the relations between the temperature and saturation pressures for either side of a curved interface.
(2) Conduction through the drop.
(3) Dissipation associated with matter transfer by condensation.
The theory is compared with recent experimental results of various workers.

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