What is bernoulli's basic theory?

Answer 1

The basic idea of the Bernoulli's Principle is very much related to the idea of conservation of energy.

Bernoulli states that for laminar flow of an ideal fluid, the energy density (energy per volume) is constant. In other words, the state (magnitude) of an incompressible and non-viscous fluid that is undergoing laminar flow remains constant. Bernoulli explains that the sum of the magnitude of the fluid's pressure, kinetic energy density and potential energy density at a given time remains constant under stated conditions.

Definition: Laminar flow is when at any given point, the velocity of the fluid particles is constant. This means that any particle passing a particular point of the motion does so at constant velocity. Laminar flow usually describes the movement of fluids moving at slow speeds.

Using Bernoulli's Principle, we can understand how fluid will behave if even one of the conditions (pressure, kinetic energy density and potential energy density) change. For example, if the pressure increases compared to the previous state, the other factor(s) must be lowered in magnitude compared to the previous state since the energy density is constant.