DuMu$^\text{x}$ 3 -- an open-source simulator for solving flow and transport problems in porous media with a focus on model coupling

TL;DR

DuMu$^ ext{x}$ 3 is an open-source, modular simulator for flow and transport in porous media, emphasizing improved usability, transparency, and multi-domain simulation capabilities for research purposes.

Contribution

The paper introduces major redesigns and new frameworks in DuMu$^ ext{x}$ 3, enhancing modularity, abstraction, and multi-domain simulation support.

Findings

Enhanced simulation component design for complex setups

More consistent finite volume scheme abstraction

Demonstrated flexibility with three numerical examples

Abstract

We present version 3 of the open-source simulator for flow and transport processes in porous media DuMu$^\text{x}$. DuMu$^\text{x}$ is based on the modular C++ framework Dune (Distributed and Unified Numerics Environment) and is developed as a research code with a focus on modularity and reusability. We describe recent efforts in improving the transparency and efficiency of the development process and community-building, as well as efforts towards quality assurance and reproducible research. In addition to a major redesign of many simulation components in order to facilitate setting up complex simulations in DuMu$^\text{x}$, version 3 introduces a more consistent abstraction of finite volume schemes. Finally, the new framework for multi-domain simulations is described, and three numerical examples demonstrate its flexibility.