Ideal Fluids And Bernoulli's Equation

Ideal fluids are incompressible, nonviscous and laminar. Incompressibility implies constant densities. Viscosity implies resistance to motion. Laminarity implies constant velocities.

Ideal fluids have constant total energies. Changes in pressure must be accompanied by changes in kinetic and/or gravitational potential energy that keep the total energy constant. This implies for all points:

• P + ρv² / 2 + ρgy = C

where P is the pressure, ρ is the density, v is the velocity, g is the gravitational acceleration, y is the height and C is some constant.

This equation is known as Bernoulli's Equation.