I've seen in piping and ventilation systems, when they branch off, the continuation of the main trunk gets smaller. Presumably this keeps the pressure (sorta) constant along the whole length of the main trunk.
So I wanna do this with a swimming pool pump return. My current outlets are about 9' off the pool bottom (very old in-ground). This causes a dead spot in the middle of the pool where cr*p collects and it's also the hardest to reach with the vacuum.
My thought is a single pipe running vertically down the sidewall with a number of holes drilled into it - try to get the water flowing "differently" than it does now. Ideally I eliminate this dead spot.
I'm not interested in lowering the diameter of the pipe so much as much changing the size of the holes (presumably smaller holes at the top where the pressure is higher).
Anyhow, there's gotta be an equation or method for determining this, but I'm only a lowly electronics engineer.. I never took any fluid dynamics classes! So I don't know what this principal is called so I can't even Google it effectively. Anything is better than me just guessing at it, so what'cha got??