Transient WhitneyAV I(U) oscilations

[vencels]

Hi,

Transient WhitneyAVSolver simulation with circuits.

The same case is solved two times - by setting
1) current we should get voltage
2) voltage we should get current

Not OK

Screenshot_9.jpg (71.55 KiB) Viewed 207 times

OK

Screenshot_1.jpg (71.97 KiB) Viewed 207 times

It seems that by setting the current, the solution is more stable. However, when setting voltage, we get oscillations for the current.

I use "implicit Euler" timestepping and uniform (equal in size) timesteps. I also tried other time-stepping schemes, but not much improvement.
There are no non-linear materials (all permeabilities and conductivities are constant).

What could be the reason for such oscillations?

[vencels]

Well folks, if you encounter such issue then increase

Code: Select all

Linear System Convergence Tolerance