Journal
PHYSICAL REVIEW LETTERS
Volume 109, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.054501
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Funding
- NSF [DMR-0652269, REU PHY-1062785, MRSEC DMR-0820054]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [820054, 1105145] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Physics [1156957] Funding Source: National Science Foundation
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A liquid drop impacting a solid surface may splash either by emitting a thin liquid sheet that subsequently breaks apart or by promptly ejecting droplets from the advancing liquid-solid contact line. Using high-speed imaging, we show that surface roughness and air pressure influence both mechanisms. Roughness inhibits thin-sheet formation even though it also increases prompt splashing at the advancing contact line. If the air pressure is lowered, droplet ejection is suppressed not only during thin-sheet formation but also for prompt splashing.
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