EM module : test dipole

[HyungseonSong-plasma]

Hi, I tested the dipole example. I checked it works well. I'd like to know how to normalize an electric field. Raw data does not show the perfect wave phase patterns.

[GiudGiud]

@cticenhour

[cticenhour]

Thanks for your question @HyungseonSong-plasma. The test result uses a very coarse mesh in order to speed-up the simulation time, so the waveform is quite distorted using the test mesh. The mesh you should use here is described in the documentation: https://mooseframework.inl.gov/modules/electromagnetics/benchmarks/DipoleAntenna.html

Here, I mention that you should generate the mesh using the Gmsh tool and the .geo file included in the test directory of the dipole antenna example. Using that file, you can navigate to the folder and then call Gmsh on the command line to generate the mesh quickly:

gmsh -2 dipole_antenna_1G.geo -clscale 0.2 -order 2 -algo del2d

You should have a .msh file as the output that you can then use in the input file (within the Mesh block) to run the case again at higher resolution.

Regarding normalization: in the data presented in the example, I am using a rather rudimentary boundary condition to excite the antenna. Therefore I couldn't, at the time that I made the example, guarantee the particular value of the electric field, but could guarantee the general waveform. Presenting the data in normalized form made more sense. What I mean by this is, performing the following calculation:

$$E_{\text{normalized}}(x, y) = \frac{E(x,y)}{\left|E_{\text{maximum}}\right|}$$

Hopefully this all makes sense. Feel free to ask more questions if you have them!

[HyungseonSong-plasma]

Thank you