Topic summary
Bernoulli's equation

Extracted from the Wikipedia article Bernoulli's principle.
Incompressible flow equation
Bernoulli's equation and the Bernoulli constant are applicable throughout any region of flow where the energy per unit mass is uniform. Because the energy per unit mass of liquid in a well-mixed reservoir is uniform throughout, Bernoulli's equation can be used to analyze the fluid flow everywhere in that reservoir (including pipes or flow fields that the reservoir feeds) except where viscous forcesdominate and erode the energy per unit mass.