[Gmsh] voids adjacent to a volume edge

[Shawn Fostner]

Related to this problem, I'm still trying to find a solution, is it 
possible to use physical groups to force the mesh? If I set up certain 
surfaces as groups it no longer crashes, but only meshes 2d, 3d still 
doesn't work generally, or one of the 2 regions 3d meshes, but not both.

I've tried overlapping the meshes, defining holes everywhere I can think 
of, but in the end, having a void in one region directly ajacent to the 
other just seems to make both very unhappy.

Shawn

Shawn Fostner wrote:
> Thanks David,
>
> I tried that, but now it meshes the 2d surfaces fine, but complains 
> that "Error   : No tetrahedra in region 3" (which is what corresponds 
> to the lower rectangle. Probably because its effectively open now, 
> even though its still effectively bounded on the top by volume 116. 
> The issue seems to be the overlapping boundary between volume 3 and 
> 116, which is where surface 13 (the bottom of the void) and 18 (the 
> top of the "surface" or volume 3) intersect. Not sure how to get 
> around that, how do you force it to allow you to close the bottom 
> region, but at the same time use the boundary as a void in the upper 
> region.
>
> Shawn
>
> David Colignon wrote:
>> Hi Shawn,
>>
>> I think the best solution would be to define Surface 13 as a hole in 
>> Surface 18.
>>
>> Regards,
>>
>> Dave
>>
>
>