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How Coalescing Droplets Jump
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DOI：10.1021/nn503643m.png)
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摘要
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Surface engineering at the nanoscale is a rapidly developing field that promises to impact a range of applications including energy production, water desalination, self-cleaning and anti-icing surfaces, thermal management of electronics, microfluidic platforms, and environmental pollution control. As the area advances, more detailed insights of dynamic wetting interactions on these surfaces are needed. In particular, the coalescence of two or more droplets on ultra-low adhesion surfaces leads to droplet jumping. Here we show, through detailed measurements of jumping droplets during water condensation coupled with numerical simulations of binary droplet coalescence, that this process is fundamentally inefficient with only a small fraction of the available excess surface energy (less than or similar to 6%) convertible into translational kinetic energy. These findings clarify the role of internal fluid dynamics during the jumping droplet coalescence process and underpin the development of systems that can harness jumping droplets for a wide range of applications.
Keyword:
nanostructured surface design
coalescence
droplet jumping
microfluidics
condensation
wetting
superhydrophobic
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期刊
IF:
16
论文数:
2.7W
被引数:
25.6W
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Analysis of droplet jumping phenomenon with lattice Boltzmann simulation of droplet coalescence
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