Size-effects on the surface tension near the critical point: Monte Carlo simulations of the Lennard-Jones fluid

Abstract We report Monte Carlo (MC) simulations of the Lennard-Jones (LJ) fluid at the liquid-vapor interface in the critical region. A slab-based tail method is associated with the MC simulations to approach as close as possible the critical point ( T ∗ = 0.98 T C ∗ ) . We investigate then the impact of system-sizes on the surface tension and coexisting densities by considering very large box dimensions for which the surface tension is independent of system-sizes at low temperatures.