[Gmsh] Again 2D meshing problem

Colignon David David.Colignon at ulg.ac.be
Wed Aug 10 17:23:01 CEST 2005


3D doesn't work because you try to mesh a huge volume with a very small
characteristic length around the wing and a large characteristic lengths
on the exterior sides of the box.

You ca try to "help" gmsh by building intermediate boxes, as explained and
illustrated in

http://www.geuz.org/pipermail/gmsh/2005/001606.html

and

http://www.geuz.org/pipermail/gmsh/2005/001612.html

In the attached file fx79_new.geo , I built a first box and I used the
Layers option of the Extrude command
( http://www.geuz.org/gmsh/doc/texinfo/gmsh_5.html#SEC36 )
in order to obtain a 3D mesh.

Cheers,

Dave



> Thanx Dave,
>
> that's true.
>> in your definition of plane surface 108 :
>>
>> Plane Surface(108) = {107,106, 107};
>>
>> Line Loop 107 appears two times ...
>>
>> With
>>
>> Plane Surface(108) = {107,106};
>>
>> it works very well in 2D
>
>
> i removed it and 2D works, 3D doesn't. but it's a new error - see
> message.txt
>
> cheers
>
> bernhard
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