‘Liquid–vapour’ density profiles for fluids in pores from density functional theory

Abstract

By using a simple, non-local version of the density functional theory, local densities are determined as functions of two variables: the distance from the pore wall and the distance along the pore axis. Attention is focused on evaluation of the local densities corresponding to ‘liquid–vapour’ equilibrium at the capillary condensation point. Specific calculations were carried out for a fluid interacting via a cut and shift Lennard-Jones potential between two parallel plates.