Guilin Sun
Ansys Employee

Unfortunatelt we are not allowed to download any customer files from this forum.

For periodic simulation, please use "conserve energy". This is because, any minor change in S can result in huge difference when many periods are used. as you can see, (S+ds)^N so when N is large the error will be amplified significantly.

On the other hand, the convergence testing can be challenge:

Understanding EME error diagnostics

Convergence Testing - Error Diagnostics - Method for Using Diagnostics

EME Convergence Testing - An Intuitive Approach

Convergence testing process for EME simulations