Prashanth
Ansys Employee

Hello Kyle,

Below are my additional comments to your two questions:

-- 2 pairs of periodics: I assume yours is a 3D model. It is possible to have two periodic pairs here. Try to get a matching conformal mesh along the translational directions of the periodics. And help Fluent by providing the exact offset distance. For 2D model, it is one symmetry and one periodic pair. 

-- solid zones across periodics with energy: This is not supported as documented in the User docs: 14.4.1.2. Constraints for Periodic Heat Transfer Predictions.The red colored warnings can be due to this reason.

Let me know if you need more help with this.