elastic-tube-1d : Unclear / wrong physicial parameters

The dimensionless stiffness is supposed to be a function of material properties and inlet velocities. In terms of code, either the stiffness is computed from these, or it is fixed and some properties or the inlet velocities should be deduced.
But here, both inlet and stiffness have an independant definition (which could be correct if these are used to compute E or h, but I don't think it's done, at least not explicitly).
I'm not confident enough with the code to say if E or h is deduced somewhere , but something definitely wrong for me is the dx = L / kappa instead of dx = L / N. Material properties should not impact the mesh size if the mesh size is another parameter (N).
Currently, N and kappa happen to have the same value so it has no impact, but this makes it quite tricky to run the tutorial with different values without creating inconsistencies.

https://github.com/precice/tutorials/blob/8e71370f0700caa25892af04145be79a3f79aff5/elastic-tube-1d/fluid-python/FluidSolver.py#L19-L29

(For reference, paper definition of the quantities can be found around page 142 of B. Gatzhammer's thesis : https://www5.in.tum.de/pub/Gatzhammer2014_preCICE.pdf)

Any insight ?

(Poke @fsimonis , I think you have some experience with this code given the history)

Start with fluid-python/FluidSolver.py lines 19-29 and compare the definitions of N, kappa, dx, E, h, and inlet velocities with the referenced thesis. Confirm whether the material and velocity parameters are independently defined or used to derive others; done means the tutorial's mesh and physical parameters remain consistent when N and kappa differ.