[efirvida]

Hello, I'm trying to create a mesh using SHM tool around an infinite parabola, I think that my castelled mesh process is successful but I can´t figure out how to create a layer on the corners of the obstacle where the geometry is very sharp. I attach an image of my best attempt, and also I'm uploading the case file.

Any advice with this?

[yongxiang]

Hello Eduardo,
have you solved this problem with adding layer to sharp corner? I have the same problem with my mesh. Could you please share with me your solution.


regards
Yong

[piotr.mecht]

Try to play with featureAngle parameter in addLayersControl.
Third picture on this tutorial seems to be self-explainatory on how this angle affects your mesh:
https://www.cfdsupport.com/OpenFOAM-...t/node128.html


Sometimes cells on this edge cannot be created, in order to prevent creating warped cells. You can force layer addition anyway by setting maxFaceThicknessRatio parameter to a greater value (like 2.0 or 3.0 instead or 0.5), but it might affect your mesh quality.

[efirvida]

for such geometry seems that I can´t create the desired mesh, so what I deed is change a littelbit the geometry rounding that edge, and that works for me

Originally Posted by yongxiang

Hello Eduardo,
have you solved this problem with adding layer to sharp corner? I have the same problem with my mesh. Could you please share with me your solution.


regards
Yong

[Krao]

Originally Posted by efirvida

for such geometry seems that I can´t create the desired mesh, so what I deed is change a littelbit the geometry rounding that edge, and that works for me

I use cfMesh and I have a similar problem too, as you have mentioned, de-featuring is the best solution, what I have found during mesh generation. Making the sharp feature blunt or making round edges would definitely solve the problem.

[MaySea]

Hi Yong,

Have you solved the problem? I have a similar issue with my mesh, see here.

The layers keep "breaking", where mesh angles are big. I increased the featureAngle param - it helped a bit, but as you can see, the problem persists.

Cheers,
Jan

[sandBo]

Did you solved it?


I sometimes managed it to get higher coverage of the boundaryLayer by increasing the firstLayerThickness, but sometimes that also caused some other Mesh problems.
Maybye the terminationAngle could be a Solutions, which is usually 0.5 * featureAngle - but i dont have much experience with this parameter

[MaySea]

Hi sandBo,

No, I haven't, playing with the featureAngle parameter helped to ensure coverage almost everywhere except one part of my mesh with an extremely steep angle. Thanks for the tip with the firstLayerThickness - may try in the future.