Guilin Sun
Ansys Employee

The settings seems ok but some improvements should be done:

1: you will need to use override mesh to resolve the geometrically small features, with at least 4 mesh cells on each axis.

2: extend the geometry to outside of the Periodic BCs

It seems the geometry can be simplified to 2D if the structure does not change in the 3rd dimension.  But since this file is relatively small, it is fine to simulate in 3D.

Once you modified with the above 2 points, the next thing to consider is the material data they used. Make sure you use exactly the same as theirs. Otherwise I would not expect that you can get the same results. Fundamentally it is the materials that determine the result when the geometry is the same.