We discuss the initiation of capillary wrinkles, and the forces acting on a polymer film floating on the surface of water, that is stretched by an air bubble or a water droplet at its center. The boundary conditions i) underneath the bubble and the droplet ii) around the contact line, and iii) along the film were investigated. The topography of the wrinkles and the stress state around the droplet was investigated, relative to the length and number of wrinkles in the polymer film. Experiments demonstrate that the boundary conditions have a stronger impact on the extension of the wrinkles than on the formation of the buckling wavelength.

Drop on a floating sheet: Boundary conditions and topography of wrinkles

243rd National Meeting (2012)

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