A Molecular-Continuum Multiscale Model for Inviscid Liquid-Vapor Flow with Sharp Interfaces

04/05/2022
by   Jim Magiera, et al.
0

The dynamics of compressible liquid-vapor flow depends sensitively on the microscale behavior at the phase boundary. We consider a sharp-interface approach, and propose a multiscale model to describe liquid-vapor flow accurately, without imposing ad-hoc closure relations on the continuum scale. The multiscale model combines the Euler equations on the continuum scale with molecular-scale particle simulations that govern the interface motion. We rely on an interface-preserving moving mesh finite volume method to discretize the continuum-scale sharp-interface flow in a conservative manner. Computational efficiency, while preserving physical properties, is achieved by a surrogate solver for the interface dynamics based on constraint-aware neural networks. The multiscale model is presented in its general form, and applied to regimes of temperature-dependent liquid-vapor flow which have not been accessible before.

READ FULL TEXT

Authors

page 10

page 26

page 27

page 29

page 30

page 39

06/19/2021

Sharp-interface limits of the diffuse interface model for two-phase inductionless magnetohydrodynamic fluids

In this paper, we propose and analyze a diffuse interface model for indu...
03/11/2021

A phase field model for mass transport with semi-permeable interfaces

In this paper, a thermal-dynamical consistent model for mass transfer ac...
05/16/2019

A multi-prediction implicit scheme for steady state solutions of gas flow in all flow regimes

An implicit multiscale method with multiple macroscopic prediction for s...
12/17/2019

A multiscale discrete velocity method for model kinetic equations

In this paper, authors focus effort on improving the conventional discre...
08/10/2020

Modeling of non-equilibrium effects in intermittency region between two phases

This paper concerns modeling of the evolution of intermittency region be...
06/17/2020

Interface learning of multiphysics and multiscale systems

Complex natural or engineered systems comprise multiple characteristic s...
07/05/2019

Finite-Volume Simulation of Capillary-Dominated Flow in Matrix-Fracture Systems using Interface Conditions

In numerical simulations of multiphase flow and transport in fractured p...
This week in AI

Get the week's most popular data science and artificial intelligence research sent straight to your inbox every Saturday.