Source Term
 

Once I got the graph where flow rate against pressure
How can I get this result as a source term in to Star-ccm?
Thanks

The resullt is taken from modelling a diaphragm pump

There's a fan model you can be use with a momentum source region that I think should do the trick.

Actually it is a diaphgram pump

Unless you want to model the temporal phenomena of the pump (in which case you'll need to know more than flow rate vs. pressure), you can still input your curve into the fan model, right?