Example on NS Couette Flow Problem

[erny123]

Hi all, thought I would share my notebook example on the NS Couette Flow problem since it's a pretty basic problem that will allow users to play around with and get to know the equations and TRIXI ecosystem better.

I wasn't sure if I should go for a pull request or something else so I'll just post it here.

https://github.com/erny123/TRIXIExamples/blob/main/TRIXI-NS-Example.ipynb

[DanielDoehring]

I like it! The notebook style resembles somewhat the way how the documentation is structured. Maybe this could be a nice starting point for a sort of problem gallery, i.e., slightly more elaborate examples placed somewhere in the documentation.

[ranocha]

I agree. It looks like a nice example that could be added, e.g., as an elixir in examples or as part of the docs