[Gmsh] Error : Self intersecting surface mesh, computing intersections (this could take a while)

[Roman Fratczak]

Hello Steffen,

Yes. You can try to the first Optimize quality of tetra, or all of them 
(just try).

I don't know how your model looks like. If the elements on the surface 
are too big, then the solid elements (probably tetragonal) may be with 
intersecting edges or faces. Therefore the reducing size of element may 
help (especially on the surfaces).

Or- just share your model (ply) -in order to be more precise.

regards
Roman



W dniu 10.03.2014 18:06, Steffen Becker pisze:
> Hi Roman,
> when you say "enable option: optimize", you mean" Tools -> Options -> 
> Mesh -> Advanced -> Optimize quality of tetrahedra, Optimize quality 
> of tetrahedra with Netgen, Optimize high order meshes (experimental)" ?
> And why is reducing element size important? In my case it is important 
> that the object has such "90 degree corners".
>
> Regards,
> Steffen
>
> Am 10.03.2014 16:55, schrieb Roman Fratczak:
>> Hi Steffen,
>>
>> If your volume is OK (is really a closed one) - try to:
>>
>> 1. Reduce element size (especially in a curved shapes)
>> 2. Enable option "Optimize" - in mesh options
>>
>> Regards
>> Roman
>>
>>
>>
>> W dniu 10.03.2014 16:41, Steffen Becker pisze:
>>> Hello everyone,
>>>
>>> I'm a gmsh beginner and I want to create a 3D volume mesh out of a 
>>> given surface-mesh but I got the error message as seen in the 
>>> subject. You find my .geo file in the appendix.
>>> Can anyone tell me what I have to do to create a 3D mesh? I even 
>>> can't figure out where the intersection are located (don't know how 
>>> to read the intersect.pos).
>>> Sorry for my poor english.
>>>
>>> Regards,
>>> Steffen
>>>
>>>
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>>
>>
>>
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