Also depends on your goal. If you want to do some RANS sims to get the polar curves of your aircraft, snappy should do the job but you'll have to accept its limitations (layers collapsing, not getting full layer coverage, etc)

The goal is pretty clear

Generate Aerodynamic plots of Lift, Drag and Moment Coefficient and judge the performance and stability of what is being designed

Problem is the following: - low angles of attack / no seperation / wall functions above y+ 30 and easier calculation - higher angles of attack / seperation / y+ of 1 for correct prediction The first one is more relaxed and yet this already had the issues in the screenshot here If that is already wrong how can I approach the seperation region when Im sure that my seperation will not be predicted correctly

and what is being designed is a full aircraft?

Its an aircraft yes

what's your reference case to assess if you get correct results?

To make sure if I am in the right ballpark or not I had done a 2d study on the NACA0012 airfoil to see how fine the mesh had to be and that went well

The results are also double checked with more simplified methods of lift and drag calculation that make sure its in the right ballpark

are there any resources on how I can mesh a 3D airfloil or balde in salome with quads?

Some nice hints here https://cfdmonkey.com/tips-and-tricks-for-significantly-improving-your-snappyhexmesh/

I've found many of the same things through experience

Have done most of these things, so I guess for me its just keep hammering until I get something useful

Best of luck

🫠

Have you tried something like gmsh or Salome?

(I haven't used them personally)

Snappy is fine for the sorts of geometries I deal with

gmsh was not recommended, salome is too slow, however I do use Salome to import my step from fusion and convert it into a surface mesh which I use as a base STL for SHM

just because salome gives a nice evenly distributed tri surface mesh

my las ditch is Snappy to Polycells from a tri mesh, although i am unsure if that lets me put a boundary layer

Have you tried making a tri mesh with a boundary layer and then doing polyDualMesh?

this is what I was gonna try to do now

Perfect. I made some simulations with a polyMesh and the convergence was insane good

Yeah but I heard its painfully slow which is why I had dodged it for some time

it wasn't too bad in my case. The final mesh had 2 million cells

Im probably gonna sit around 10 million

how many cores how long?

the meshing that is

Did you use SHM and then converted to tri?