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The collapse of a catenoidal soap film when the rings supporting it are movedbeyond a critical separation is a classic problem in interface motion in whichthere is a balance between surface tension and the inertia of the surroundingair, with film viscosity playing only a minor role. Recently [Goldstein, etal., Phys. Rev. E 104, 035105 (2021)], we introduced a variant of this problemin which the catenoid is bisected by a glass plate located in a plane ofsymmetry perpendicular to the rings, producing two identical hemicatenoids,each with a surface Plateau border (SPB) on the glass plate. Beyond thecritical ring separation, the hemicatenoids collapse in a manner qualitativelysimilar to the bulk problem, but their motion is governed by the frictionalforces arising from viscous dissipation in the SPBs. Here we present numericalstudies of a model that includes classical friction laws for SPB motion on wetsurfaces and show consistency with our experimental measurements of thetemporal evolution of this process. This study can help explain thefragmentation of bubbles inside very confined geometries such as porousmaterials or microfluidic devices.

Collapse of a hemicatenoid bounded by a solid wall: instability and dynamics driven by surface Plateau border friction