It's been a while since I've had to do these calculations.. I'm looking for the flow rate at the wall of a 3.175 mm nozzle tip. The diameter of the delivery leading up to it is 19 mm. This is a vertical assembly and the source of the air at 70 psi is a 1/4" outer diameter tube that is approximately 2.5" above the exit. There is about 120 cfh available maximum for this setup. Anybody looking to take a shot at this, I'd be interested in seeing your solution..