identify the kind of nodes (quadratic or not)

Post processing utility for Elmer
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Chris74
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identify the kind of nodes (quadratic or not)

Post by Chris74 »

hi,

I applied "element=p:2" and "OutPutfile = toto.res "in my sif file.

I have 2 short questions about the nodes :

1) From my output file, I'd like to identify the kind of node, i.e. is it a node from my original mesh or an added node (from the quadratic requirment)?

2) If my original mesh has 100 nodes, can I considere that the numbers greater than 100 are assigned to the nodes of the quadratic mesh?

Thank you for your reply.
raback
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Re: identify the kind of nodes (quadratic or not)

Post by raback »

Hi

The p-element basis is not nodal. Only the lowest order solution is associated to nodes. You can use higher order nodal elements but they should be provided in the initial mesh.

-Peter
Chris74
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Re: identify the kind of nodes (quadratic or not)

Post by Chris74 »

Thank you Peter for your reply.

In my output file, I can see :
...
Number Of Nodes: 1521
Time: 1 1 1.00000000E-002
displacement 1
Perm: 5267 5267
...

So I'd like to export only the 1521 displacement's results corresponding to the original nodes. Is it easily possible ?

Chris
kevinarden
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Re: identify the kind of nodes (quadratic or not)

Post by kevinarden »

If you use Paraview to post-process it will save the data to a file. If you want to write directly from Elmer, look at the SaveScaler solver in the models manual.
raback
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Re: identify the kind of nodes (quadratic or not)

Post by raback »

Hi

If you want to parse yourself then ElmerPost format might be useful too. Or Gmsh output format.

For p-elements the first dofs in line relate to the permutated list of linear nodal dofs.

-Peter
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