Non-Equilibrium Gibbs' Criterion for Completely Wetting Volatile Liquids
  During the spreading of a liquid over a solid substrate, the contact line can stay pinned at sharp edges until the contact angle exceeds a critical value. At (or sufficiently near) equilibrium, this is known as Gibbs' criterion. Here, we show both experimentally and theoretically that for completely wetting volatile liquids there also exists a dynamically-produced critical angle for depinning, which increases with the evaporation rate. This suggests that one may introduce a simple modification of the Gibbs' criterion for (de)pinning, that accounts for the non-equilibrium effect of evaporation. 
Yannis Tsoumpas, Sam Dehaeck, Mariano Galvagno, Alexey Rednikov, Heidi   Ottevaere, Uwe Thiele, Pierre Colinet
physics.flu-dyn