Cfdof/FreeCAD 0.21.2 Generates Incorrect Periodic B.C.'s
hooshsim opened this issue · 4 comments
Huge thank you to the development team for implementing periodic boundary conditions in the latest version of FreeCAD/CfdOF...a job well done!
To take advantage of the periodic boundary conditions, I built a sector model of an axial fan installed in a wind-tunnel. In my model, I assigned P1 as slave and P2 as master surfaces using rotational option. Then I updated the fan patch in the boundary field file (0/U) for rotationality. I ran the case for about 300 iterations without any issues. The predicted moments were much smaller than expected ones. After checking the 0/U file, I realized that slave surface (P1) is missing from the patch list in the boundary field file as shown below.
I also changed p2_slave to P1_slave and re-ran the case and no improvements in the solution. Any suggestions or recommendations?
P2_master
{
type cyclicAMI;
}
P2_slave
{
type cyclicAMI;
}
Thank you
Couldn't upload the case file due to unsupported file type.
Couldn't upload the case file due to unsupported file type.
Could you try zipping it or uploading it on the forum please?
This is actually the expected behaviour. The master and slave patches are renamed as (master patch name)_master and (master patch name)_slave for internal reasons - so the P1 patch is not missing, it is just renamed to P2_slave. It's just a matter of naming so should have no bearing on results.