On 12/4/24 07:27, 王艺康 wrote:
**
I am using dealii to carry out a simulation using DataOut which is
outputting my data as a vtu file, I would like to extract the surface
data of the vtu file but when I open the vtu file using paraview, there
is no information about my boundaries saved in it, which leaves me with
no way to extract the data for a specific boundary. I would appreciate
if you could tell me how to do this!
Are you asking how to add information about the boundary indicators to
the file?
If so, you may be interested in this glossary entry:
https://dealii.org/developer/doxygen/deal.II/DEALGlossary.html#GlossBoundaryIndicator
If you want to output information that lives on faces (in the code
example on the glossary page, that is the boundary_id, but it could also
be the solution itself), you should use DataOutFaces instead of DataOut.
Best
W.
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