Plot N1Curl field

dolfinx
1

Hello community,

I am solving electromagnetic problem using edge elements (N1Curl function space of order 1).

My question is, Is it possible to plot the solution obtained (using external software like paraview)?

What have i tried so far:

  1. Tried to export the solution and geometry to xdmf file, which works fine in scalar case but fails using edge elements. Error: Only lagrange elements are supported, interpolate or project before exporting.
  2. L2 projection onto the Continuous Lagrange space of order 2, the issue is how can i visualize the orientation in this case?

Is it possible to also see the orientation of the field?

Thank you in advance

2

As the error message states, you should interpolate or project to a suitable Lagrange space.
For N1curl functions, continuous Lagrange is not a suitable space. One should use discontinuous Lagrange (preferably use interpolate rather than project, as it is way faster) and use a writer that supports arbitrary order continuous or discontinuous Lagrange, i.e VTXWriter or VTKFile.

i am not sure what you mean by orientation, do you mean the vectors? Then you can use the Glyph filter in paraview to look at the vectors.