Query on how to report RMS of residuals for a limited volume within the overall model
 

I would like to be able to find the RMS residual values on a per part (individual part) or per domain. Is there a way to do this and have it reported in the Solver Manager?

Yes, right click on the graph and pick "monitor properties" then choose the domain and residual you wish to monitor.

You can also include equation residuals in the results file (Output Control/Results File/Output Equation Residuals = All)

Then, in CFD-Post you can post-process them at will. Say

maxVal(U-Mom.Residual)@REGION:MySubVolume
maxVal(H-Energy.Residual)@Inlet
rmsAve(P-Mass)@REGION:MyOutlet