Simulate E field distribution in a material with non-linear conductivity

- June 29, 2020 at 9:08 pm
  
  icellb
  Subscriber
  
  Hi,
  
  I'm trying to simulate E field distribution in between two copper electrodes in vacuum, with a field grading (FG) material put near the electrodes, see attached picture. The field grading material's conductivity is a function of E field. The J-E curve of the FG is shown in the picture.
  
  I found only DCconduction solution type allows me to input non-linear J-E curve. However, the simulated E field in the FG material is zero (I've ticked solve inside the FG material). I also tried changing the conductor/insulator conductivity threshold in design setting to make the FG recognized as a conductor but it did not work either.
  
  I also tried electroDCconduction solution type but it always pops up an error "Process 3deqs terminated abnormally" and was not able to simulate.
  
  How can I simulate the reasonable E field in the FG? I succeeded with Comsol but I think Ansys should be able to do this, too.
- June 30, 2020 at 2:16 am
  
  mchristi
  Ansys Employee
  
  Set Conductor/insulator threshold 10x smaller than conductivity of FG material and be sure that this material is set to "solve inside".
- June 30, 2020 at 3:31 pm
  
  icellb
  Subscriber
  
  Hi Mchristi,
  
  Thanks for your reply but these were exactly what I did.

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