I'm confused. If you have 4 total of something coming in, and 2.2 x 2 = 4.4 coming out, it looks like your violating some basic rules somewhere. Am I not interpreting something correctly? I'm not a flow expert, but this doesn't sound right to me.
Mark's right, something doesn't sound right.
2 inlets at 4LPM
2 outlets, 2.2 LPM each, total of 4.4 LPM total
1. what does your mass flow rate tell you? (remember we conserve mass, not flow rate)
2. how are you measuring this? goals or surface parameters? please create goals for each surface and then goals for the inlets together and outlets together. and if you want to get fancy, setup some equation goals to check everything is working the way you expect it.
3. check convergence. how did your solution end. did the results converge? post the convergence plots for us to take a look at.
if you haven't done it already. i'd suggest running without rotation just to see what happens. also can you describe your setup. outputting the report would be a good first step if you can't upload the files.
1. Did you saw "Vortex crosses pressure opinengs "error within solver screen?
Never use VOLUMETRIC flow rate to measure inlet/outlet flows. Always use MASS flow rate, this is what is conserved in the analysis.
It sounds to me as though you have a pressure drop in the assembly, so the volumetric flow rates aren't adding up. This is because the volumetric flow rate is calculated at the absolute pressures of the goal surfaces. For example, a mass flow rate of 0.01 lb/sec Nitrogen at ambient pressure (14.7 psia) will be ~218 Liters/min of volumetric flow. But at a pressure of 12 psia (slightly below ambient), the volumetric flow increases to 267 Liters/min for the same mass flow rate of 0.01 lb/sec because of the lower gas density. So if you have a pressure drop in your system, you may be seeing higher volumetric flow values at the outlets due to the lower pressure (i.e., reduced gas density), even though the mass flows are properly conserved.
Thanks for your feedback, and I understand your point: conservation of "mass (flow)", but not "volume flow".
It would really matter if we used compressible fluid, but we are using incompressible fluid, density is nearly constant, control volume doesn't change, thus the mass flow should be conserved in this case. That's why I've been thinking that there must be something else that I'm missing...
see comments above. we need more information to help. i'd highly recommend building a simple model for investigation. if you have problems with the simple problem it is either a method issue or a software issue.