MODELING THE DYNAMICS OF MOLECULAR FILMS BY MONTE-CARLO SIMULATION

The spreading characteristics of a fluid on an attractive solid substrate are studied using standard vertical but especially horizontal Solid On Solid models. In case of the horizontal Solid On Solid model the wetting dynamics is investigated both with the Langevin theory and Monte Carlo simulations. In the partially wet case relaxation to stable wetting angle is observed, whereas in the completely wet system a precursor film is found to behave linearly in time and the layers next to the precursor as (t log t)1/2 in agreement with the theory. The layers above the precursor film of molecular thickness seem to show diffusive profiles as found previously in the continuum theory.