Journal
APPLIED PHYSICS LETTERS
Volume 104, Issue 16, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.4873338
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Funding
- National Research Foundation of Korea (NRF) grant
- Korea government (MSIP) [2011-0030075]
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We investigate the drop splashing threshold S-T of water on a rough surface. Surface roughness has been known to facilitate drop splashing, but a counterexample has been observed. Here, we suggest a possible explanation of how surface morphology affects drop splashing. We focus on the air flow during the splashing event and estimate ST on a rough surface. To demonstrate this effect, experiments using well-designed surfaces were conducted, and the results agree with our relation. This work shows that surface morphology can both suppress and facilitate drop splashing, and presents a method to predict ST on surfaces with different morphologies. (C) 2014 AIP Publishing LLC.
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