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In conventional dropwise condensation on a hydrophobic surface, the condensate drops must be removed by external forces for continuous operation. This Letter reports continuous dropwise condensation spontaneously occurring on a superhydrophobic surface without any external forces. The spontaneous drop removal results from the surface energy released upon drop coalescence, which leads to a surprising out-of-plane jumping motion of the coalesced drops at a speed as high as 1 m/s. The jumping follows an inertial-capillary scaling and gives rise to a micrometric average diameter at steady state.
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Boreyko et al. (Mon,) studied this question.
www.synapsesocial.com/papers/69dc39f01fd473d97f9f5582 — DOI: https://doi.org/10.1103/physrevlett.103.184501
Jonathan B. Boreyko
Chuan-Hua Chen
Physical Review Letters
Duke University
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