Add simple SGS to Adami and Morris Viscosity

[svchb]

TGV:

This shows the default values give reasonable results

With C_S=0.5:

[codecov]

Codecov Report

Attention: Patch coverage is 98.18182% with 1 line in your changes missing coverage. Please review.

Project coverage is 71.13%. Comparing base (6d04215) to head (2f3bbbb).
Report is 58 commits behind head on main.

Files with missing lines	Patch %	Lines
src/io/write_vtk.jl	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #753      +/-   ##
==========================================
+ Coverage   70.53%   71.13%   +0.60%     
==========================================
  Files          96      106      +10     
  Lines        5976     6753     +777     
==========================================
+ Hits         4215     4804     +589     
- Misses       1761     1949     +188     

Flag	Coverage Δ
unit	71.13% <98.18%> (+0.60%)	⬆️

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[efaulhaber]

Can you explain the plots please? What are you showing? Is lower or higher better? And I can't tell the points in the first plot apart.

[svchb]

Can you explain the plots please? What are you showing? Is lower or higher better? And I can't tell the points in the first plot apart.

These are the csv files plotted you receive when running the TGV validation case so this is time over the error. So lower is better. This is not really an accuracy improving method. So this only shows that the results are reasonable and with tuning results could be improved. I would see this is more as a method to obtain additional stability for high Reynolds number flows or suppressing spurious reflections at adaption level jumps.

[svchb]

It would also make sense to merge #801 first