A Heat Transfer Model of Dropwise Condensation Underneath a Horizontal Substrate

Abstract:

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For finding influence of the condensing surface to dropwise condensation heat transfer, a fractal model for dropwise condensation heat transfer has been established based on the self-similarity characteristics of droplet growth at various magnifications on condensing surfaces with considering influence of contact angle to heat transfer. It has been shown based on the proposed fractal model that the area fraction of drops decreases with contact angle increase under the same sub-cooled temperature; Varying the contact angle changes the drop distribution; higher the contact angle, lower the departing droplet size and large number density of small droplets; dropwise condensation translates easily to the filmwise condensation at the small contact angle ;the heat flux increases with the sub-cooled temperature increases, and the greater of contact angle, the more heat flux increases slowly.

Info:

Periodical:

Advanced Materials Research (Volumes 199-200)

Edited by:

Jianmin Zeng, Zhengyi Jiang, Taosen Li, Daoguo Yang and Yun-Hae Kim

Pages:

1604-1608

DOI:

10.4028/www.scientific.net/AMR.199-200.1604

Citation:

Y. F. Chen "A Heat Transfer Model of Dropwise Condensation Underneath a Horizontal Substrate", Advanced Materials Research, Vols. 199-200, pp. 1604-1608, 2011

Online since:

February 2011

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$35.00

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