Create a simple structure solver in FEniCS and a corresponding tutorial

[BenjaminRodenberg]

Currently this is just a very rough idea, but something in the direction of our already existing FSI tutorials would be very nice.

• SU2-CalculiX
• OpenFOAM-CalculiX
• 3D tube test case
• Lid Driven Cavity with flexible bottom (see Tutorial: Fluent + X fluent-adapter#2)
• many more...

Necessary steps:

• Implement a simple FEM Structure solver in FEniCS
• Implement one of already existing tutorials with FEniCS as structure participant
• set up 3D tube example

[uekerman]

I recommend to set up an example with OpenFOAM, not with SU2. Maybe directly our main FSI3 tutorial, which will come soon.

[BenjaminRodenberg]

@richahert solved the first two todos in his thesis. Refer to #38 and precice/tutorials#38. We still do not cover the 3D tube example.

[BenjaminRodenberg]

@uekerman the set up 3D tube example should either be dropped entirely or we can open a new issue in https://github.com/precice/tutorials and close this one. What do you think?

[IshaanDesai]

FEniCS can be used as a versatile 2D structure solver using the new design of the fenics-adapter here: #59. Do we still plan to pursue the 3D tube example? If not then we can close this issue.

[BenjaminRodenberg]

I think with respect to structure solvers and FSI (in 2d) the fenics-adapter has a good state that is also documented in Richard's thesis.

A tutorial for the 3D tube (or similar) is a nice-to-have that could be covered in the scope of another bachelor thesis or similarly sized project.

[BenjaminRodenberg]

Note that by now there is also a 3D Tube tutorial that uses OpenFOAM & Calculix: precice/tutorials#23