Creation of prompt and thin-sheet splashing by varying surface roughness or increasing air pressure

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....

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Bibliographic Details
Published in:Physical review letters 2012-07, Vol.109 (5), p.054501-054501, Article 054501
Main Authors: Latka, Andrzej, Strandburg-Peshkin, Ariana, Driscoll, Michelle M, Stevens, Cacey S, Nagel, Sidney R
Format: Article
Language:English
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Summary: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.109.054501