Vapour-liquid coexistence in many-body dissipative particle dynamics

TL;DR

This paper introduces a many-body dissipative particle dynamics model that accurately simulates vapour-liquid coexistence with a sharp interface and a near-zero density vapour phase, useful for free surface fluid mechanics.

Contribution

The paper develops a novel many-body DPD model featuring local-density dependent self energies to simulate vapour-liquid coexistence with a sharp interface.

Findings

Successfully models vapour-liquid coexistence with a sharp interface

Demonstrates application to free surface fluid mechanics problems

Simulates a pendant drop with the new model

Abstract

Many-body dissipative particle dynamics is constructed to exhibit vapour-liquid coexistence, with a sharp interface, and a vapour phase of vanishingly small density. In this form, the model is an unusual example of a soft-sphere liquid with a potential energy built out of local-density dependent one-particle self energies. The application to fluid mechanics problems involving free surfaces is illustrated by simulation of a pendant drop.