Bernoulli effect
$$\underbrace{ P_{1} }{ \text{Pressure Energy} }+\underbrace{ \frac{1}{2}pv^{2}{1} }{ \text{Kinetic Energy per unit volume} }+ \underbrace{ pgh{1} }{ \text{Potential Energy per unit volume} }=P{2}+\frac{1}{2}pv^{2}{1}+pgh{2}$$
basis of aircraft lift
to account for the loss of energy through friction, Poiseuille’s law is used