  In this article, we present the foam-dg project, which provides a bridge
between OpenFOAM(R) and the high-order DG (discontinuous Galerkin) framework
BoSSS. Thanks to the flexibility of the coupling approach, mixed calculations
where some parts of the equation system are solved in OpenFOAM(R) and others
are solved in BoSSS are easily possible. This is showcased using the convective
Cahn-Hilliard equation, where the Cahn-Hilliard part is solved in BoSSS and the
Navier-Stokes part is solved in OpenFOAM(R). The obtained results appear
reasonable, though the main focus of this paper is to present and document the
foam-dg project rather than on quantitative results.
