Thank you for your replies.
The system is set up, but there is no way for me to measure it.
I am not really sure what you mean dcasto. Are you using the Bernoulii's equation to get the pressure drop?
Using the continuity equation, I can get the velocities coming in and out of the difusser, but...
I have a tank with water flowing into it through a diffuser. The water is flowing out at a similar rate as it is flowing in. I am trying to find the head between the level of the water in the tank and the level of the diffuser to keep the water flowing into the tank.
Please see attched file...
