Retraction dynamics of aqueous drops upon impact on non-wetting surfaces

By Denis Bartolo, C. Josserand, D. Bonn. Journal of Fluid Mechanics, 2005

314 citations recorded by the source corpus.

We study the impact and subsequent retraction of liquid droplets upon high-speed impact on hydrophobic surfaces. Extensive experiments show that the drop retraction rate is a material constant and does not depend on the impact velocity. We show that on increasing the Ohnesorge number, $\Oh\,{=}\,\eta/\sqrt{\rho R_{\rm I} \gamma}$, the retraction, i.e. dewetting, dynamics crosses from a capillary-inertial regime to a capillary-viscous regime. We rationalize the experimental observations by a simple but robust semi-quantitative model for the solid-liquid contact line dynamics inspired by the standard theories for thin-film dewetting.

Subfields: Computational Mechanics, Surfaces, Coatings and Films

View Paper: https://www.semanticscholar.org/paper/c8d95f58b0884cf4298952d0277b69f2422a29a3

Citations in the corpus

• Drop Impact on a Solid Surface (2016, unknown): “Left: Spreading and rebounding dynamics illustrated by snapshots as well as the evolution of the spreading radius with time, taken from Bartolo et al. (2005).”