2019/08/03 by Felix Gerlach, Maximilian Hartmann, Gerlach, Felix +3
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Soft Condensed Matter (cond-mat.soft) #Surface Modification and Superhydrophobicity #Theoretical and Computational Physics #nanoparticles nucleation surface interactions
paper · pdf · doi:10.48550/arxiv.1908.01221
openalex publication_date 2019/08/03 · openalex created_date 2022/07/28 · openalex updated_date 2026/07/28
Real world surfaces can often be modeled as a collection of edges, corners,\ndents or spikes of varying roundness. These features exhibit individual\nspontaneous wetting behaviors comprising pinned contact lines, rivulets or\ncusps. If occurring in proximity to one another, as is often the case in\napplications, these wetting properties interact, resulting in an overall\nchanged wetting pattern on the surface. Hence, there is considerable interest\nin understanding when, and to what extent, interactions occur, and how wetting\nthen deviates from the wetting of isolated surface features. The present study\naddresses these questions by experimentally and theoretically studying the\ncapillary interaction of sharp-edged 90\deg (outer) and 270\deg (inner)\ncorners in proximity to one another. It is shown that the spontaneous wetting\nat the convex outer corner is in uenced by the concave inner corner even when\nthey are separated by a distance of several times the capillary length, while\nthe wetting of the inner corner takes place unaffected by the outer corner,\nexcept when the separating distance is much smaller than the capillary length.\nThe final contact line shape at the inner corner is measured and theoretically\nmodelled for contact angles up to 90\deg.\n