Audio calculation for wind instruments

[IPowIPi]

Hi, hope I'm in the right sub forum.

Am currently in progress of modelling a wind instrument in OpenSCAD (or if this doesn't work FreeCAD, MoI or Blender).
In order to reduce the amount of prototype iterations it would be great if I could blow virtual air into the thing and compute which tone would get out. It is a fipple based design, so lip tension wouldn't be a factor.
Is that possible? And if yes, is that possible with the FreeCAD CFD workbench?
And if it is indeed possible - would I need my instrument be modelled with surfaces (NURBS/SubD) or would a high res STL with tesselated roundings (as I e.g. could get it out of OpenSCAD) be sufficient?

[thschrader]

Hi, sorry for late reply.
At the moment, the solvers below are supported by the cfdof-workbench.
Hisa is a compressible solver, but the use is intended for high speed aerodynamics.
But maybe...
https://hisa.gitlab.io/
https://github.com/jaheyns/CfdOF

I have no clue about computational accoustics, please see thesis from Ryan Flamm,
he uses the rhoPimpleFoam solver. Maybe that helps.

cfdof_solver.JPG (55.16 KiB) Viewed 4301 times

[thschrader]

Maybe elmer can do the job

elmer.JPG (24.63 KiB) Viewed 4294 times

[IPowIPi]

Thanks for the directions! Will have a look.