The theorem of Bernoulli is a direct application of the principle of conservation of energy. In other words, it is said that if the fluid does not exchange energy with the outside (through friction, motors, heat…) it must remain constant.
The theorem considers the three unique types of energy that the fluid possesses that can change from one point to another in the conduction. These types are: gravitational potential energy, kinetic energy, and energy due to flow pressure (hydrostatic).
The theorem that Daniel Bernoulli stated for the first time in the year 1726 and says that: in all streams of water or air the pressure is large when the speed is small and, on the contrary, the pressure is small when the speed is large. There are some limitations to this theorem, but we will not dwell on them here.
Applications of the theorem:
The chimney can be exploited because of the high, the fact that the speed of the wind is constant and higher at higher altitudes. The faster the wind blows over the mouth of a chimney, the lower the pressure and the greater the pressure difference between the base and the mouth of the chimney, therefore, the combustion gases are better extracted.
The Bernoulli equation and the continuity equation also tell us that if we reduce the cross- sectional area of a pipe to increase the velocity of the fluid passing through it, the pressure will decrease.
In an automobile carburetor, the air pressure that passes through the carburetor body decreases when it passes through a throttle. The gas flows when the pressure decreases, mix and vaporize the stream of air.
The flow of a tank is given by the Bernoulli equation.
In oxygen therapy, most high-delivery delivery systems use Venturi- type devices, which are based on the Bernoulli principle.
