  Wetting and drying of a rigid substrate by a Lennard-Jones fluid in molecular
dynamics simulations is reported. The size of the substrate particles, being
smaller than the fluid particles in former simulations, is now taken to be
equal to, respectively larger than, that of the fluid particles. Recently, for
the latter type of system a first order drying transition has been reported.
Like before we find a continuous-like transition for all systems considered.
This also holds for substrates with incompletely-filled top layers, the
so-called molecularly rough surfaces. All systems studied behave qualitatively
alike, but inconsistencies are found in the solid-vapour surface tension on
approach of the wetting transition and for the solid-fluid surface tension in
general.
