Dissipative particle dynamics for interacting systems

Abstract

Dissipative particle dynamics (DPD) was used to present the implementation of conservative forces between DPD particles and to analyze the dynamics of nonideal fluids. The conservative forces were derived for a specific free-energy density system to determine its interfacial and thermodynamic properties. The analysis suggested that the central pairwise additive forces could be efficiently recovered if the free energy per particle depended on the averaged local density. It was found that the proposed forces led to weaker structure at short distances and provided the freedom in choice of free energy.