Flow of water through orifices traced by food dye in real time and then sped up to see change in flow over time more clearly. The 1/16 inch diameter orifices are vertically spaced 1/2 inch apart. Velocity of water through an orifice is a function of the head (i.e., the depth of the orifices compared to the water level). As the water level drops, the flow through each orifice decreases.

Song: Flow Down

Artist: Triple5 Here

Song License: CC BY

Source: Free Musical Archive