Accession Number : AD0633702

Title :   TRANSIENT DROPLET GROWTH DURING DROPWISE CONDENSATION.

Descriptive Note : Technical memo.,

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK ORDNANCE RESEARCH LAB

Personal Author(s) : Hurst,C. J.

Report Date : 27 APR 1966

Pagination or Media Count : 158

Abstract : The study investigated the possibility of determining high heat-transfer rates during dropwise condensation by analyzing single condensate droplets growing on a convectively-cooled surface. A mathematical model included both the droplet and a portion of the condensing surface. Experiment utilized condensate droplets, growing on a thin copper surface, to verify the analysis. Experimental results agreed closely with predicted results--indicating high heat-transfer rates at droplet perimeters. Both experiment and analysis showed that no single vapor-to-condensing-surface temperature difference may be expected during dropwise condensation. Limitations on the calculation procedure pertaining to the region around the droplet perimeter restricted the accuracy of heat-transfer rate predictions; a separate study of droplet perimeter is suggested. (Author)

Descriptors :   (*CONDENSATION, DROPS), (*DROPS, *HEAT TRANSFER), CONVECTION(HEAT TRANSFER), MATHEMATICAL MODELS, CONDUCTION(HEAT TRANSFER), FILMS, NUCLEATION, SURFACE PROPERTIES, THERMAL CONDUCTIVITY

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE