Split a flow into two streams

All,

Thank you for taking the time.  I would like to do something in solidworks flow simulation that is easier said than done.  Essentially, I would like to have one gas inlet that is forced to split into two directions.  I would like to manipulate the percentage of the flow that goes one way or the other.  I've been looking for 3-way valves, or manual valves, but have had no success.

I have been doing the initial work by inputting the two flows as two different inlets, but the problem is that I am trying to find the generated pressure thru this one side of the system and having a defined inlet forces me to specify a pressure.

I hope I'm not being too vague and I would appreciate some feedback,

Thanks,

Matt

SolidworksFlow Simulation