dsurendr
Ansys Employee

In reference to this thread: 

https://studentcommunity.ansys.com/thread/domain-decomposition-in-hfss/  

haoxuanzhang - Information (including reference papers) for HFSS's domain decomposition method can be found in the Help documentation. Domain decomposition is used by default in all hybrid solve models. It's also used in our periodic boundary solutions when you Create from unit cell designs. It can also be used to distribute a model that can't be solved on one machine (due to RAM limitations).