Making superhydrophobic splashes by surface cooling
Rodolphe Grivet, Axel Huerre, Thomas Séon, Christophe Josserand
Abstract
When an impacting drop is given a sufficiently high velocity, it is expected to splash shortly after impact, due to take-off of the spreading lamella. In this study, we show that the splashing threshold is decreased when the surface is cooled below the liquid freezing point, due to the interplay between solidification and spreading which affects the apparent dynamic wettability of the surface. This effect is such that below -60\ifmmode^\circ\else\textdegree\fi{}C, the splashing behavior becomes identical to that on superhydrophobic surfaces.
Topics & Concepts
SplashWettingDrop impactLamella (surface anatomy)Materials scienceDrop (telecommunication)MechanicsSolid surfaceSurface (topology)Composite materialThermodynamicsPhysicsChemical physicsMechanical engineeringGeometryEngineeringMathematicsFluid Dynamics and Heat TransferSurface Modification and SuperhydrophobicityElectrohydrodynamics and Fluid Dynamics