Open AccessDynamics of initial drop splashing on a dry smooth surface
Author(s) -
Zhenlong Wu,
Yihua Cao
Publication year - 2017
Publication title -
plos one
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.99
H-Index - 332
ISSN - 1932-6203
DOI - 10.1371/journal.pone.0177390
Subject(s) - splash , drop (telecommunication) , drop impact , mechanics , solid surface , surface tension , liquid drop , lamella (surface anatomy) , weber number , radius , physics , materials science , meteorology , thermodynamics , chemical physics , composite material , turbulence , telecommunications , computer security , reynolds number , computer science
We simulate the onset and evolution of the earliest splashing of an infinite cylindrical liquid drop on a smooth dry solid surface. A tiny splash is observed to be emitted out of the rim of the lamella in the early stage of the impact. We find that the onset time of the splash is primarily dependent on the characteristic timescale, which is defined by the impact velocity as well as the drop radius, with no strong dependence on either the liquid viscosity or surface tension. Three regimes are found to be responsible for different splashing patterns. The outermost ejected droplets keep extending radially at a uniform speed proportional to the impact speed. Finally, we discuss the underlying mechanism which is responsible for the occurrence of the initial drop splash in the study.