dropwise condensation

dropwise condensation

[¦dräp‚wīz ‚kän·dən′sā·shən]
(thermodynamics)
Condensation of a vapor on a surface in which the condensate forms into drops.
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Contributed by engineers from Asia, the US, the UK, and Australia, chapters discuss self-cleaning and superhydrophobic surfaces, treatments and constructing a digital model of biological shark skin/shark, approaches to manufacturing low viscous resistance drag with biomimetic textures, characteristic analysis of drag-reducing surfaces with biological morphology, and biomimetic surfaces for enhanced dropwise condensation heat transfer.
A more efficient condensation process is dropwise condensation on hydrophobic (water-repellent) surfaces, where the vapor is condensed into individual droplets which can be easily shed away by gravity.
In certain cases the condensate appearance resembles to that of typical dropwise condensation of pure fluid on a hydrophobic surface.
The degradation is larger for specimens with wide fin spacing, because benefits of dropwise condensation are more pronounced under conditions of little or no bridging.