Abstract

Good agreement is obtained between the predictions stemming from a theoretical framework to derive the cluster concentration and the pressure of a gas at low temperature with molecular-dynamic simulations of a simple fluid system. The theory is based upon a rigorous study that considers the nonideal contributions. In particular it is derived that the pressure is not simply the sum of partial pressures but it also includes a nonideal term. The present scheme represents an improvement over the ideal gas mixture approximation used in the homogeneous nucleation theory.