[Robat]

Hello dear Foamers!

The basic: I'm working with a meshing tool which handles with millimeters (Salome) and the ideasUNVToFoam interpretes it as meters, so it needs to be "convertToMeters" with transformPoints (-scale).
My case: A flow though a blood artery bifurcation at millimeter scale. The walls are really "natural" shaped so I not expected the best mesh quality (hexahedric mesh).

I ran checkMesh before scaling: Everything was "OK". Non-orthogonality was pretty high (=60), but below the limit (=70).

After scaling (transformPoints -scale '(0.001 0.001 0.001)') the second check gave the following results:
- non-orthogonality raised to 150
- wrong oriented faces
- skewness jumped above 13.000.000
- and with smaller scaling even negative cell volumes occur

I'm copletely perplexed! Correct me if I'm wrong, but a simple scaling should have no effect on mesh quality.

Please could someone give me some advise how to keep my mesh quality when scaling or at least by what this quality lost is caused ?

Thanks in advance,
Robert