  Molecular models of real fluids are validated by comparing the vapor-liquid
surface tension from molecular dynamics (MD) simulation to correlations of
experimental data. The considered molecular models consist of up to 28
interaction sites, including Lennard-Jones sites, point charges, dipoles and
quadrupoles. They represent 38 real fluids, such as ethylene oxide, sulfur
dioxide, phosgene, benzene, ammonia, formaldehyde, methanol and water, and were
adjusted to reproduce the saturated liquid density, vapor pressure and enthalpy
of vaporization. The models were not adjusted to interfacial properties,
however, so that the present MD simulations are a test of model predictions. It
is found that all of the considered models overestimate the surface tension. In
most cases, however, the relative deviation between the simulation results and
correlations to experimental data is smaller than 20 %. This observation
corroborates the outcome of our previous studies on the surface tension of
2CLJQ and 2CLJD fluids where an overestimation of the order of 10 to 20 % was
found.
