Adjust overset tutorial mesh parameters

[anilyil]

Description

The overset tutorial adds an example M6 wing mesh. While the levels L3 through L1 work now, the number of off-wall layers is probably a bit too small. The target growth ratio for the most refined mesh should be around 1.05, currently the L1 gets a grid ratio of around 1.15.

We should probably update the number of off-wall layers. This will involve also checking the grids again and running the analyses again to update the grid convergence results, though they should not change too much.

[anilyil]

The overset mesh tutorial is added in PR: #23 23

[marcomangano]

@anilyil this issue can be closed, right?

[anilyil]

I don't think we should close this. This issue is ideal for a student who wants to start learning overset grids and grid convergence. To close this issue, someone needs to review all of the mesh parameters in the tutorial and do a grid convergence study. In this process, we can also update the mesh parameters with our current best practices.