Hello,
I suggest first starting with creating some kind of “cut line” or “slice line” in VisIt or Tecplot.
If you want to do this in Python, it is more difficult. The electric field on each triangular element can be getting from the element_model_values as every 3rd value:
z=Z[::3]
since each triangle has 3 edges and the length of the element model values is 3 times the number of triangles.
It looks like @SinglePhotonGuy has done something similar by plotting the magnitude of the electric field in 2d.
Basic questions from a new user - Visualization of Resuls and Mesh for 1D and 2D Sims