title: Splashing of liquids: Interplay of surface roughness with surrounding gas.
abstract: We investigate the interplay between substrate roughness and surrounding gas pressure in controlling the dynamics of splashing when a liquid drop hits a dry solid surface. We associate two distinct forms of splashing with each of these control parameters: Prompt splashing is due to surface roughness and corona splashing is due to instabilities produced by the surrounding gas. The size distribution of ejected droplets reveals the length scales of the underlying droplet-creation process in both cases.
authors.affiliation: The James Franck Institute and Department of Physics, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, USA.
authors.forename: Lei
authors.initials: L
authors.lastname: Xu
authors.forename: Loreto
authors.initials: L
authors.lastname: Barcos
authors.forename: Sidney R
authors.initials: SR
authors.lastname: Nagel