A cylindrical surface getting swollen

[gbettega]

Hello forum,
with this parameters

• MMG meshing parameters
• Hausdorff distance: 2.01053
• hmin: 4.02105
• hmax: 80.4211
• hgrad: 1.3

the “long” cylindrical surfaces of the shown component

whose initial triangularion is shown

after surface meshing have become swollen, as shown?

Why?
Grazie mille
Giovanni

[spbhat]

Hello,

Can you try using a smaller value for sharp angle detection, say 5 degrees? If you are using command line then, -ar 5.
Refer to: -ar – Mmg Platform

Once you have the first remeshed part, again use mmg with the default angle detection to generate better quality mesh.

I think what is happening is that MMG is not able to detect the sharp edge, hence it tries to smoothen the surface.

Best regards,
Sourabh Bhat
Post-Doc, INRIA

[gbettega]

Thank you very much,
exactly as you said. In the picture, "I) " means one iteration with ;
"I) , II) " means two iterations, the first with ar = degrees1, the
last with ar = degrees2

Giovanni