We have an exciting announcement about badges coming in May 2025. Until then, we will temporarily stop issuing new badges for course completions and certifications. However, all completions will be recorded and fulfilled after May 2025.
Guilin Sun
Ansys Employee

Did you check what method you use now?

One suggestion for better result is to use integer number of meshes in one period along the periodic direction, instead of the equivalent index. Otherwise  it will not keep the periodicity after discretization.