title: Creation of prompt and thin-sheet splashing by varying surface roughness or increasing air pressure.
abstract: 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.
authors.affiliation: The James Franck Institute, The University of Chicago, Illinois 60637, USA. alatka@uchicago.edu
authors.forename: Andrzej
authors.initials: A
authors.lastname: Latka
authors.forename: Ariana
authors.initials: A
authors.lastname: Strandburg-Peshkin
authors.forename: Michelle M
authors.initials: MM
authors.lastname: Driscoll
authors.forename: Cacey S
authors.initials: CS
authors.lastname: Stevens
authors.forename: Sidney R
authors.initials: SR
authors.lastname: Nagel