[Gmsh] Almost structured mesh - Why aren't they structured?

[Paolo Tricerri]

Dear Feifei,

I thank you for your help and I had a look at the code you sent.
Unfortunately, I must use tetrahedral meshes. Is there a way to have
the same structured mesh you sent me but with tetrahedra?

Many thanks

Regards,

Paolo

2012/9/21 Feifei TONG <tongf.fei at gmail.com>:
> Hi Paolo,
>
> I will Recombine the surfaces and volumes to make the mesh structured.
>
> See attached the revised file.
>
> Regards,
> Feifei
>
>
> On 20 September 2012 22:02, Paolo Tricerri <paolo.tricerri at epfl.ch> wrote:
>>
>> Dear Gmsh users,
>>
>> I have a small question about how GMSH extrudes a meshed surface. The
>> script I have attached to the email, creates a cylindrical tube
>> extruding one of the two flat borders in the z direction. The mesh of
>> the extruded border is structured and symmetric w.r.t the line x=y
>> (the straight line of 45 degrees). When I extrude the mesh, the two
>> curved surfaces I get are almost structured. There are some elements
>> (placed in random position?) which make the mesh non completely
>> structured.
>>
>> Why this? I would need a structured mesh and not an almost structured
>> mesh. Is that possible to have the two curved surfaces structured?
>>
>> Many thanks for any suggestion,
>>
>> Paolo
>>
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>
>