[Gmsh] Newby: How long does it take ...

[Bernhard Stoevesandt]

hi,

i'm trying to do a new 2d grid, which is supposed to be a lot finer on the
inner boundary. now again, gmsh doesn't get it done - so far. but i do get
some output on the message console:
in general it says: Warning: Volume has changed: (number1->number2) and
from time to time:
Warning: Triangle non deleted

over all it looks like this and goes on and on ...

Warning : Volume has changed (3.36813->1.36507)
Warning : Volume has changed (1.47902->0.406362)
Warning : Triangle non deleted
Warning : Volume has changed (0.487045->0.126401)
Warning : Volume has changed (0.13948->0.0641473)
Warning : Volume has changed (2.40068->1.01833)
Warning : Volume has changed (3.63759->1.61241)
Warning : Volume has changed (3.83528->1.63936)
Warning : Volume has changed (2.34677->1.04149)
Warning : Volume has changed (3.51521->1.646)
Warning : Almost colinear points in circum circle computation (d =
7.6382e-17)
Warning : Volume has changed (4.01326->1.88323)
Warning : Almost colinear points in circum circle computation (d =
-2.84332e-17)
Warning : Volume has changed (4.46845->1.93934)


any idea what it means? i'll attach the geo file again

bernhard





> Bernhard Stoevesandt wrote:
>> hello,
>>
>> since i'm new to meshing and the program, i don't have any estimate how
>> long the meshing should take. now i started the program yesterday on
>> this
>> 2D structur. i did start 2d meshing and the (pretty new and not so slow)
>> pc is running now for more than 16 hours. is that just the time it takes
>> -
>> or what's wrong. attachted is the input geo-file.
>>
>
> Bernhard - strange: meshing your example on my Mac works just fine (it
> takes less than 1 second), but it fails on Windows with the default
> algorithm ("Isotropic").
>
> I will look into it. In the meantime, use the "Triangle" algorithm (in
> Tools->Options->Mesh->General->2D algorithm). The resulting mesh will
> not be as nice, but it should work on Windows.
>
> Take care,
>
> Christophe
>
> --
> Christophe Geuzaine
> Applied and Computational Mathematics, Caltech
> geuzaine at acm.caltech.edu - http://geuz.org
>
>
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