title: Filling transitions on rough surfaces: Inadequacy of Gaussian surface models.
abstract: We present numerical studies of wetting on various topographic substrates, including random topographies. We find good agreement with recent predictions based on an analytical interface-displacement-type theory, except that we find critical end points within the physical parameter range. As predicted, Gaussian random surfaces are found to behave qualitatively different from non-Gaussian topographies. This shows that Gaussian random processes as models for rough surfaces must be used with great care, if at all, in the context of wetting phenomena.
authors.affiliation: Max Planck Institute for Dynamics and Self-Organisation, 37077 Göttingen, Germany.
authors.forename: Renaud
authors.initials: R
authors.lastname: Dufour
authors.affiliation: Max Planck Institute for Dynamics and Self-Organisation, 37077 Göttingen, Germany.
authors.forename: Ciro
authors.initials: C
authors.lastname: Semprebon
authors.affiliation: Max Planck Institute for Dynamics and Self-Organisation, 37077 Göttingen, Germany.
authors.forename: Stephan
authors.initials: S
authors.lastname: Herminghaus