In some industrial processes, cooling is achieved by running a liquid film over a hot surface. When the flow rate of the film is very low and/or the surface is very hot, the liquid film breaks down. That is, large dry patches form on the surface. These dry patches can be rewetted at low heat fluxes, but eventually persist at higher ones. This results in an abrupt decrease in heat transfer coefficient and overheating of the surface. In this study, an experimental investigation was conducted with subcooled liquid films flowing over horizontal cylindrical surfaces. The combinations of film flow rate and heat flux at which dry patches appear were measured. At conditions prior to dry patch formation, heat transfer coefficients were also determined. Distilled water was used as the test fluid.
|Original language||English (US)|
|State||Published - 1980|
|Event||Int Cent for Heat and Mass Transfer, Heat and Mass Transfer in Metall Syst, Semin Prepr - Dubrovnik, Yugosl|
Duration: Sep 3 1979 → Sep 7 1979
|Other||Int Cent for Heat and Mass Transfer, Heat and Mass Transfer in Metall Syst, Semin Prepr|
|Period||9/3/79 → 9/7/79|
ASJC Scopus subject areas