Characteristic interfacial structure behind a rapidly moving contact line
arXiv:1807.11910 · doi:10.1103/PhysRevLett.122.018001
Abstract
In forced wetting, a rapidly moving surface drags with it a thin layer of trailing fluid as it is plunged into a second fluid bath. Using high-speed interferometry, we find characteristic structure in the thickness of this layer with multiple thin flat triangular structures separated by much thicker regions. These features, depending on liquid viscosity and penetration velocity, are robust and occur in both wetting and de-wetting geometries. Their presence clearly shows the inadequacy of theoretical analysis that ignores the instability in the transverse direction.
arXiv commentversion2: data and results unchanged; incorporated a model explaining data; fixed typos
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