Dynamics of Dewetting Fronts: to Pinch or not to Pinch

  • Zürcher Guinea, Miguel (Universidad Carlos III de Madrid)
  • Moreno Boza, Daniel (Universidad Carlos III de Madrid)
  • Sevilla Santiago, Alejandro (Universidad Carlos III de Madrid)

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Thin films on hydrophobic surfaces undergo spinodal dewetting and form dry holes with moving contact lines at the solid-liquid interface. The opening of the dry holes takes place through an advancing front which accumulates liquid in a growing ridge, leaving behind a very thin precursor film. Here we report a numerical study of the dynamics of this advancing ridge, and the resulting morphology of the dewetted film. The effect of wall slip on the monotonic, oscillatory, or pinching ridge evolution are investigated.