BTW, the element in bottom left corner is too triangle for good FEM. To 
solve this providing an additional element inside the curved boundary looks 
to be a common approach, you can find more details 
here http://dealii.org/developer/doxygen/deal.II/step_6.html#Abettermesh 

среда, 21 сентября 2016 г., 18:15:05 UTC+3 пользователь Chenchen Liu 
написал:
>
> Hi all,
>
>
> I have to use quadratic shape function (Q2 elements) to do my project 
> (2D). Previously the code works well with Q1 linear elements, when I want 
> to input the gird with Q2 elements generated by Gmsh, it gives the 
> following error:
>
> An error occurred in line <1418> of file <../source/grid/grid_in.cc> in 
> function
>
>     void dealii::GridIn<2, 2>::read_msh(std::istream &) [dim = 2, spacedim 
> = 2]
>
> The violated condition was: 
>
>     false
>
> The name and call sequence of the exception was:
>
>     ExcGmshUnsupportedGeometry(cell_type)
>
> Additional Information: 
>
> The Element Identifier <8> is not supported in the deal.II library when 
> reading meshes in 2 dimensions.
>
>
> And, it says the supported quad element should have 4 nodes and 4 edges. 
> Just want to check whether deal.ii support Q2 elements by Gmsh.
>
> My mesh looks like the following
>
>
> <https://lh3.googleusercontent.com/-Lk96g0ZRgFg/V-KjPDZp3cI/AAAAAAAAAKs/NZpvWhx06Y4uL6x-6b1gLVfUAayRY5p2gCLcB/s1600/11.png>
>
>
>
> If deal.ii does not support higher order element by Gmsh, what other 
> format is recommended? Thanks!
>
>
> Best,
>
> Chenchen
>
>
>
>

-- 
The deal.II project is located at http://www.dealii.org/
For mailing list/forum options, see 
https://groups.google.com/d/forum/dealii?hl=en
--- 
You received this message because you are subscribed to the Google Groups 
"deal.II User Group" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to dealii+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

Reply via email to