Hydraulics studies the behavior of liquids in motion. Why is it studied, among other things, pressure, speed, flow of the liquid and flow. In the study of hydrodynamics, Bernoulli’s theorem, which deals with the law of conservation of energy, is of utmost importance, since it indicates that the sum of the kinetic energies, the potential and the pressure of a liquid in motion in a certain point it is equal to that of any other point. Hydrodynamics fundamentally investigates incompressible fluids, that is, fluids, since their density practically does not change when the pressure exerted on them changes.

The surface tension of a liquid is called like this, the energy necessary to increase its surface area per unit. This definition implies that the liquid has a resistance to increase its surface. This effect allows some insects, such as the cobbler, to move along the surface of the water without sinking. Surface tension (a manifestation of intermolecular forces in liquids), together with the forces that come into contact with them, gives rise to capillarity. As an effect it has the elevation or pressure of the surface of a liquid in the area of ​​contact with a solid.

In fluid dynamics, flow is the amount of fluid that passes in a unit of time. Usually it is identified with the volumetric flow or volume that passes through a certain area in the unit of time. Less frequent, it is identified with the flow of mass or mass that passes through a certain area in the unit of time.

Fluid mechanics is the branch of continuous media mechanics, the branch of physics that, in turn, studies the movement of fluids and also the forces they cause. The fundamental defining characteristic of fluids is their inability to resist shear stresses (which causes them to worry in a definite way). Likewise, it studies the interactions between the fluid and the contour that limits it. The fundamental hypothesis on which all fluid mechanics is based is the continuum hypothesis.

Turbulent flow is called the movement of a fluid that occurs in a chaotic way and in which the particles move in a disorderly way and the trajectories of the particles form small aperiodic (uncoordinated) eddies like water in a large channel. downhill. Due to this, the path of a particle can be predicted up to a certain scale, from which the path of the particle is unpredictable, more precisely chaotic.