Bernoulli equation is a dynamic equation for the stable flow of ideal fluid, which means that the sum of pressure potential energy, kinetic energy and potential energy at any two points on the streamline remains unchanged when the viscosity loss is ignored.

Where p, ρ and v are the pressure, density and linear velocity of the fluid, respectively; H is the vertical height; G is the acceleration of gravity; C is a constant.

Each term in the above formula represents the pressure energy per unit volume of fluid.

P, gravitational potential rhogh and kinetic energy (1/2) * rhov.

2. In the process of moving along the streamline, the sum is constant, that is, the total energy is conserved.