Bernoullitörvény

Bernoullitörvény, also known as Bernoulli's principle, is a fundamental concept in fluid dynamics. It describes the relationship between the speed of a fluid, its pressure, and its potential energy. The law, named after Swiss mathematician Daniel Bernoulli, states that for an inviscid flow, an increase in the speed of the fluid occurs simultaneously with a decrease in pressure or a decrease in the fluid's potential energy.

In simpler terms, as a fluid moves faster, its pressure decreases, and as it moves slower, its pressure increases. This principle applies to both liquids and gases. It is a specific case of the conservation of energy principle applied to flowing fluids. The equation that represents Bernoulli's principle is often written as P + (1/2)ρv^2 + ρgh = constant, where P is the pressure, ρ is the fluid density, v is the fluid velocity, g is the acceleration due to gravity, and h is the height.

Bernoulli's principle has numerous practical applications. It explains how airplane wings generate lift, as the air flowing over the curved top surface moves faster than the air flowing under the flatter bottom surface, resulting in lower pressure above the wing and thus an upward force. It also plays a role in the operation of devices like carburetors, Venturi meters, and atomizers. Understanding Bernoullitörvény is crucial for analyzing fluid flow in various engineering and scientific contexts.