Abstract
If the condensate does not completely wet the wall, then, as was explained in Sect. 1.2, no cohesive condensate film is formed. Rather there are formed single drops of liquid. Heat transfer coefficients with drop condensation are distinctly larger than with film condensation. In the case of the condensation of water vapor, heat transfer coefficients larger by a factor of four to eight have been measured. To be sure, it has been shown that all the investigated substances, especially water, which condense on the heating surfaces commonly used, wet completely, as long as the material of the heating surface and the liquid have not been polluted. This also corresponds to the experience that a water film is a good sign of well cleaned laboratory apparatus.
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© 1992 Springer-Verlag Berlin Heidelberg
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Stephan, K. (1992). Drop Condensation of Stagnant Vapors. In: Heat Transfer in Condensation and Boiling. International Series in Heat and Mass Transfer. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-52457-8_3
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