Contact angle on heterogeneous surfaces: Weak heterogeneities

  • Pomeau Y
  • Vannimenus J
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Abstract

We investigate the equilibrium merging of a liquid-vapor interface and of a solid surface with a weak and random heterogeneity in the mechanical approximation. To keep a well-posed problem one must introduce an external length as the capillary length in a gravity field or the diameter of a liquid drop. The contact angle hysteresis is much smaller than the surface heterogeneity when this one is small and at random. © 1985.

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Authors

  • Y. Pomeau

  • J. Vannimenus

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