Sir, as you mentioned I am trying to extend the domain, but sir can you tell me why even after giving 48 number of cores (which is in total present in the system), the task manager is showing around 16% usage of CPU, it is taking too much time to generate mesh (More than 5 hours but still it didn't create any mesh).
Can you tell me how can I increase the speed given that I have 48 Cores, 128 GB RAM and using Academic Research Licensed Ansys.

In workbench module when I go to tools>options>Mechanical APDL, I can see the that only 2 is written on Processors, Should I change this number to 48 and also should I change the Workspace or database memory?
I am afraid to change any default settings as I am not familiar with this.