A Particle-based Multiscale Solver for Compressible Liquid-Vapor Flow

TL;DR

This paper introduces a multiscale particle-based solver for simulating liquid-vapor flows with sharp interfaces, integrating microscopic fluid properties into macroscopic models for improved accuracy.

Contribution

It develops a novel multiscale solver combining particle-based microscale modeling with macroscopic two-phase flow equations, avoiding ad-hoc constitutive relations.

Findings

Enables accurate simulation of phase interfaces.

Incorporates microscale fluid properties directly.

Improves modeling of complex liquid-vapor flows.

Abstract

To describe complex flow systems accurately, it is in many cases important to account for the properties of fluid flows on a microscopic scale. In this work, we focus on the description of liquid-vapor flow with a sharp interface between the phases. The local phase dynamics at the interface can be interpreted as a Riemann problem for which we develop a multiscale solver in the spirit of the heterogeneous multiscale method, using a particle-based microscale model to augment the macroscopic two-phase flow system. The application of a microscale model makes it possible to use the intrinsic properties of the fluid at the microscale, instead of formulating (ad-hoc) constitutive relations.