We present recent results of coupling free and porous‐media flow applications and the development of the corresponding adapter. The main focus is on simulations based on DuMuX ( https://dumux.org/ ) which is an open‐source framework for solving flow problems, especially porous‐media flow. We present results using the partitioned approach of preCICE for different scenarios and compare it, where applicable, with monolithic simulations or exact solutions.