There is currently not really such a thing as a Nutils adapter. Coupling Nutils is so simple that directly calling the preCICE Python API from the application scripts is the way to go.
The best way to learn how to couple a Nutils application script is to look at some examples:
- Two heat conduction scripts coupled to one another (Nutils 6 and 7)
- A heat conduction script coupled to CFD for conjugate heat transfer (Nutils 7)
- An ALE incompressible Navier-Stokes solver coupled to solid mechanics for fluid-structure interaction (Nutils 6)
- A linear solid mechanics solver coupled to fluid mechanics for fluid-structure interaction (Nutils 8)
- A channel flow solver coupled to a transport problem solver (Nutils 7)
- A fracture mechanics solver volume-coupled to a dummy electro-chemistry corrosion model (Nutils 6)
- A 1D compressible fluid solver coupled to a 3D compressible fluid solver (uses deprecated version of Python bindings) (Nutils 5)
We recommend using a Python virtual environment to install different Nutils versions. See the requirements.txt and the run.sh of the cases included in the preCICE tutorials for an example.
Version 8 requires bottombar as a dependency. pip might automatically install version 2.0, which has known issues when used with preCICE. A patch was implemented in version 2.1, thus a workaround is to explicitly re-install version 2.1: pip3 install --user bottombar==2.1.