Is it possible to combine the eigen solver with the EM modules such as VectorHelmholtz, EMWaveSolver or WhitneyAVSolver (AV) solvers?
Essentially I would like to do something similar to what was discussed here: [viewtopic.php?t=7153] and discussed here: [https://computational-acoustics.gitlab. ... ed-part-3/], but for electromagnetics thus for RF cavities.
I created a simple case of a cylinder which have known solutions (can be found in most microwave books, e.g. Pozar) and would like to find the eigenvalues (or Modes) using Elmer. For simple forms such as rectangles and cylinders it is simple to both find and create solutions yourself, for instance see wolphram demonstartion project: [https://demonstrations.wolfram.com/Cyli ... Resonator/], but for more complex cases/geometries I hope Elmer would be a better fit!
I found this example using the WhitneyAV solver in your testcases: [https://github.com/ElmerCSC/elmerfem/bl ... n/case.sif].
But could not get it to work. I have also tried using the VectorHelmholtz solver since the helmholtz equation (eq 20.3 in the Elmer ModuleManual) naturally becomes a eigenproblem with w^2 as eigenvalue:
curl curl E = w^2 E assuming J = 0 and epsilon = mu = 1
For the AV solver I get error:
EigenSolveComplex: . Error occurred in umf4num: -1.0000000000000000
And for the Helmholtz I get error:
ERROR:: EigenSolveComplex: Unknown linear system method:
Best and thank in advance
Robin