The equations I started with used the velocity of the water, which is dependent on the volume (height, depth...) of the water, but that's what I'm attempting to maintain as a constant...
I'm constructing a fountain of sorts. The idea is that water flows from Tank A to Tank B, then through a filter and then is pumped back to Tank A. Tank A has an open top, and Tank B has a variable amount of water in it, so I can't seal off the system and pull a vacuum.
I have water draining from a tank A into a tank B through a hole (or short pipe) and then being pumped back from B to A. If I know the rate of the pump (say 19 liters per minute), what should the diameter of the hole be so that the volume of tank A remains the same? The actual volume of A is...