Mixed-dimensional PDEs: the Dune-MMesh module
Dune-MMesh is a DUNE grid implementation tailored for numerical applications with physical interfaces. The package wraps CGAL triangulations and exports a predefined set of facets as a separate interface grid. In combination with DUNE-FEM, it is well-suited for the numerical discretization of mixed-dimensional systems of partial differential equations.
For more details, see documentation and publication.