[Gmsh] mesh problem

[stefano zinna]

Dear David.

Thank you for the fast reply. I made a routine to avoid double lines so 
i think this isn't the problem.
I have the original step file 
(https://download.yousendit.com/Z01PSkhYcVhuSlIzZUE9PQ). Can you explain 
which steps are better to generate the mesh?

kind regards,
Stefano

David Colignon wrote:
>
> On 17/12/09 18:36, stefano zinna wrote:
>> Dear Sirs.
>>
>> I converted a .stl file into .geo
>> (https://download.yousendit.com/Z01NSU5OOW5samQzZUE9PQ) for gmsh.
>
> Hi Stefano,
>
> very nice geometry !
>
> Are you *sure* that each line shared by two triangles is only defined 
> once ? (it seems to be the case...)
>
> I'm
>> able to generate the surface mesh but it is not able to recognize the
>> volume. Is it a problem in the file or it depends on the complexity of
>> the geometry?
>
>
> When you try to create the volume with the GUI and you click on a 
> first surface, you can see that almost all the surfaces are then 
> selected and change color to red. But the GUI keep asking to select 
> volume boundary to fully close the volume. Due to the complexity of 
> the geometry, it is very difficult to detect with the eye by zooming 
> on every part of the geometry if some surfaces are missing, so I 
> cannot see there is a real problem in the geometry or if some surfaces 
> are left unselected...
>
> Converting your CAD file to the STL format and then converting it to 
> .geo is not the best solution. Do you have access to the original CAD 
> file ? Can you try to export it to the STEP format instead ?
>
> Regards,
>
> Dave
>