Bernoulli's principle
Bernoulli's Principle (pronounced: ber-NOO-leez prin-suh-puhl) is a fundamental concept in fluid dynamics that describes how the pressure in a fluid decreases as the fluid's speed increases. This principle is named after the Swiss mathematician and physicist Daniel Bernoulli, who first formulated it in his book Hydrodynamica in 1738.
Etymology
The term "Bernoulli's Principle" is derived from the name of its discoverer, Daniel Bernoulli. The word "principle" comes from the Latin principium, meaning "a beginning, foundation, origin, or source."
Definition
Bernoulli's Principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in the fluid's pressure or potential energy. This principle is a restatement of the conservation of energy principle for flowing fluids and can be used to explain various phenomena in fluid dynamics, such as the lift force on an airfoil.
Related Terms
- Fluid Dynamics: The study of the effects of forces and energy on liquids and gases.
- Pressure: The force exerted by a fluid per unit area.
- Conservation of Energy: The principle that energy cannot be created or destroyed, only transferred or transformed.
- Aerodynamics: The study of how air moves around objects.
Applications
Bernoulli's Principle has numerous applications in various fields, including engineering, physics, and medicine. For example, it is used in the design of airplanes, Venturi meters, and blood flow measurement devices.
See Also
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