Dispersion concept for interface closures in the context of coupling free-flow and porous-media multiphase flow on the REV scale

A wide range of environmental and technical systems contain multiple flow domains, where system dynamics depend on the details of each domain and their coupling. Accurate descriptions of such coupled dynamics can be challenging; high-resolution micro-scale simulations are often prohibitively expensive and REV-scale simulations often neglect the relevant dynamics.

This research project focuses on the analysis and improvement of REV-scale models for mass, momentum, and heat transfer processes at a porous-media free-flow interface. The goal is to include high-resolution experimental and simulation data into an efficient multi-scale modeling approach. This is done using data-driven parametrizations where micro-scale processes are represented in ample detail on the REV scale, allowing for the accurate simulation of real-world applications. Such parametrizations of multi-scale models incorporate high-resolution data using machine learning techniques. Extensions to include multi-phase flow and heterogeneous domain interfaces are developed.