期刊
APPLIED PHYSICS LETTERS
卷 98, 期 5, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3553782
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资金
- National Natural Science Foundation of China (NSFC) [60936001, 11072244]
- National Basic Research Program of China (973 Program) [2007CB310500]
- State Key Laboratory of Nonlinear Mechanics
An analysis based on the energy conservation is presented for the self-propelled droplet during coalescence of two droplets of the same size over a superhydrophobic rough surface. The self-propelled behavior occurs only for the coalescence of droplets with a certain range of radius. An analytical relation is established among the coalescence-induced velocity, surface energy, viscous dissipation, and droplet size if gravity is negligible. The coalescence-induced velocity increases with increasing droplet size to a maximum and then decreases with the size, which is in good accord with the experimental observation reported in the literature. (C) 2011 American Institute of Physics. [doi:10.1063/1.3553782]
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