Boundary layer
 

I used snappyHexMesh to create these two meshes:

http://postimg.org/image/4c7xslwb3/1 layer BL:
http://postimg.org/image/l39sfladl/http://s27.postimg.org/su81jxgin/1layer.jpg

2 layers BL:

http://s15.postimg.org/ur32tpo47/2layer.jpg

I used featureAngle = 180 in both cases. Could you please tell me which parameter I should change to avoid the problems with 2 layers BL creation?

doodek

Hello doodek,
Try first nGrow = 0
If you still have problem, try to relax the mesh quality parameters during layers creation (see Post #3 in this thread).
Regards,
Eloïse