Influence of Surface Wettability on Dropwise Condensation Heat Transfer

Yun Fu Chen

doi:10.4028/www.scientific.net/AMR.228-229.869

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 228-229Influence of Surface Wettability on Dropwise...

Influence of Surface Wettability on Dropwise Condensation Heat Transfer

Abstract:

For finding influence of the surface wettability on dropwise condensation heat transfer, a model for dropwise condensation heat transfer has been established based on the drop size distributions and the heat transfer rate through a single drop with considering influence of contact angle to heat transfer. It has been shown based on the proposed model that up to a drop radius of 5μm, the rate of decrease in the drop population density is not as steep as the rate for a drop radius greater than 10μm, because coalescence between drops starts taking place. Varying the contact angle changes the drop distribution; higher the contact angle, lower the departing droplet size and large number density of small droplets. Heat flux first increases and then decreases with increasing contact angle under the temperature difference condition.

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Periodical:

Advanced Materials Research (Volumes 228-229)

Pages:

869-873

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.228-229.869

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Online since:

April 2011

Authors:

Yun Fu Chen

Keywords:

Contact Angle (CA), Dropwise Condensation, Heat Transfer

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