elastic-tube-1d: Correct place for monolithic reference simulation?

[BenjaminRodenberg]

There exists a monolithic reference case for the 1d-elastic-tube, which I used, for example, for the results presented in my talk "High-Order Time Stepping in Partitioned FSI with Black-Box Solvers". I think it would be useful to have a place to provide the monolithic reference simulation - potentially also with some documentation. I have the feeling that the tutorials are not the right place for these kind of examples where preCICE is actually not used at all (it's monolithic), but I cannot really imagine a better place, as well.

Currently, I have the monolithic version of the 1D tube in a private repository, but there is (as far as I know) no public place where this code is stored. I will attach a zip with the (very messy) source code to this issue for archiving and for providing some basis for the discussion.

preCICE-Experiments-master-1DTube.zip (:warning: use with care Code is from 2018 and outdated, but basic idea for the monolithic simulation should be clear)

[MakisH]

I assume this would again be essentially one / a couple of files, right? Why not put it in a tools/ directory in the elastic-tube-1d? I assmume that people would like to use that as a validation case.

[uekerman]

IIRC this should only be one additional term in the fluid equations, meaning a one-liner.
Could be easier to add a parameter for this.

[BenjaminRodenberg]

IIRC this should only be one additional term in the fluid equations, meaning a one-liner.

Generally that's right. Here's an excerpt from my thesis draft with the corresponding equations:

Main todos here are to update the code provided above and implement the monolithic solver somewhere (either inline as suggested by @uekerman or in tools as suggested by @MakisH). Both solutions are fine from my perspective.

[BenjaminRodenberg]

Labeled this issue as student, because I think the overall approach and goal is quite clear. But we still have to do it and make sure that the results are correct in the end.

[MakisH]

For context, we now have a monolithic case in the partitioned-pipe-two-phase, in a monolithic/ directory:

https://github.com/precice/tutorials/tree/develop/partitioned-pipe-two-phase/monolithic

We do not define any related concrete rule in the contributing guidelines:

https://precice.org/community-contribute-to-precice.html