[Gmsh] Visualization High Order FE - 3D

Fri Jan 21 12:26:59 CET 2011

On 21/01/11 11:40, sara.minisini at polimi.it wrote:
> Dear all,
> I am a new user of Gmsh and I need some help.
> I'm trying to use it to visualize second order discontinuous FE on a
> three dimensional mesh.
> I create the .msh file (attached below) where I wrote all the
> information of the second order mesh (list of vertices and
> discretization points),
> I store the solution(just example not real solution of my problem) in
> the $ElementNodeData format but it seems that the number of nodes (10)
> for each element is considered as a value of the solution.
> Can anybody help me to correct the file?
>
> I take this opportunity to congratulate with the developers for the
> features available in the software.
>

Hi Sara - At the moment there is no way to specify the interpolation 
matrices explicitely in the new .msh format (it's planned, but not done 
yet), so if you want to use non-isoparametric elements you have to use 
the old .pos format...

> Thank you,
> Regards
> Minisini Sara
>
> $MeshFormat
> 2.2 0 8
> $EndMeshFormat
> $Nodes
> 63
> 1 1 0 1
> 2 0 0 0
> 3 0 1 1
> 4 0 0 1
> 5 0 2 1
> 6 1 2 1
> 7 0 1 0
> 8 0 2 0
> 9 1 2 0
> 10 2 2 0
> 11 2 2 1
> 12 2 1 1
> 13 1 0 0
> 14 2 0 1
> 15 2 1 0
> 16 2 0 0
> 17 0.5 0.5 1
> 18 0.5 0 1
> 19 1 1 1
> 20 1 1 0.5
> 21 1.5 0.5 1
> 22 1 0 0.5
> 23 1.5 0 1
> 24 1.5 0.5 0.5
> 25 1.5 0 0.5
> 26 0 0 0.5
> 27 0 0.5 0
> 28 0.5 0 0
> 29 0 0.5 1
> 30 0 1.5 1
> 31 0.5 1.5 1
> 32 0 1 0.5
> 33 0 1.5 0.5
> 34 0.5 1.5 0.5
> 35 0.5 0.5 0.5
> 36 0 0.5 0.5
> 37 0.5 0 0.5
> 38 0.5 2 1
> 39 0 2 0.5
> 40 0.5 2 0.5
> 41 1 2 0.5
> 42 1.5 2 0.5
> 43 1.5 2 1
> 44 1.5 1.5 1
> 45 1.5 1.5 0.5
> 46 0 1.5 0
> 47 0.5 1.5 0
> 48 0.5 0.5 0
> 49 0.5 2 0
> 50 1.5 2 0
> 51 1 1 0
> 52 1.5 1.5 0
> 53 2 2 0.5
> 54 2 1.5 0.5
> 55 2 1.5 0
> 56 2 1.5 1
> 57 2 0.5 1
> 58 2 1 0.5
> 59 1.5 0.5 0
> 60 1.5 0 0
> 61 2 0.5 0.5
> 62 2 0 0.5
> 63 2 0.5 0
> $Elements
> 18
> 1 11 2 99 2 1 15 14 16 24 61 23 25 62 63
> 2 11 2 99 2 3 4 7 13 29 36 32 35 48 37
> 3 11 2 99 2 2 7 4 13 27 36 26 28 37 48
> 4 11 2 99 2 1 4 3 13 18 29 17 22 35 37
> 5 11 2 99 2 3 7 8 9 32 46 33 34 49 47
> 6 11 2 99 2 3 8 5 9 33 39 30 34 40 49
> 7 11 2 99 2 3 5 6 9 30 38 31 34 41 40
> 8 11 2 99 2 1 3 6 9 17 31 19 20 41 34
> 9 11 2 99 2 1 13 15 16 22 59 24 25 63 60
> 10 11 2 99 2 1 12 14 15 21 57 23 24 61 58
> 11 11 2 99 2 6 10 11 12 42 53 43 44 56 54
> 12 11 2 99 2 1 3 9 13 17 34 20 22 51 35
> 13 11 2 99 2 3 7 9 13 32 47 34 35 51 48
> 14 11 2 99 2 1 6 12 15 19 44 21 24 58 45
> 15 11 2 99 2 6 10 12 15 42 54 44 45 58 55
> 16 11 2 99 2 6 9 10 15 41 50 42 45 55 52
> 17 11 2 99 2 1 9 6 15 20 41 19 24 45 52
> 18 11 2 99 2 1 13 9 15 22 51 20 24 52 59
> $EndofElements
> $ElementData
> 1
> "P2"
> 0.0
> 3
>
> 1
> 18
> 1 10 0.01 1.45 2 2.45 3 3.25 4 4.215 5 5.35
> 2 10 0.1 1.35 2 2.75 3 3.15 4 4.15 5 5.45
> 3 10 0.1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
> 4 10 0.01 1.65 2 2.005 3 3.25 4 4.25 5 5.25
> 5 10 1.8 1.295 2 2.95 3 3.95 4 4.95 5 5.05
> 6 10 1.23 1.52 2 2.35 3 3.35 4 4.335 5 5.25
> 7 10 1 1.85 2 2.95 3 3.95 4 4.95 5 5.35
> 8 10 1 1.75 2 2.85 3 3.75 4 4.85 5 5.215
> 9 10 1 1.225 2 2.335 3 3.45 4 4.55 5 5.95
> 10 10 1 1.15 2 2.335 3 3.665 4 4.775 5 5.885
> 11 10 0.91 1.35 2 2.25 3 3.15 4 4.115 5 5.115
> 12 10 0.81 1.115 2 2.215 3 3.335 4 4.335 5 5.115
> 13 10 1 1.25 2 2.225 3 3.125 4 4.125 5 5.125
> 14 10 0.123 1.5 2 2.215 3 3.225 4 4.225 5 5.115
> 15 10 0.01 1.5 2 2.5 3 3.5 4 4.5 5 5.5
> 16 10 0.91 1.5 2 2.5 3 3.5 4 4.5 5 5.5
> 17 10 0.551 1.5 2 2.5 3 3.5 4 4.5 5 5.5
> 18 10 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
> $End of Solution
>
>
>
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-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine