Depinning of three-dimensional drops from wettability defects
Fluid Dynamics
2013-03-25 v1
Abstract
Substrate defects crucially influence the onset of sliding drop motion under lateral driving. A finite force is necessary to overcome the pinning influence even of microscale heterogeneities. The depinning dynamics of three-dimensional drops is studied for hydrophilic and hydrophobic wettability defects using a long-wave evolution equation for the film thickness profile. It is found that the nature of the depinning transition explains the experimentally observed stick-slip motion.
Cite
@article{arxiv.0811.2918,
title = {Depinning of three-dimensional drops from wettability defects},
author = {Ph. Beltrame and P. Hänggi and U. Thiele},
journal= {arXiv preprint arXiv:0811.2918},
year = {2013}
}
Comments
6 pages, 9 figures, submitted to epl