# Bernoulli Principle

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Category: Education

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Bernoulli’ s bio Bernoulli’s principle Venturi Tube Bernoulli’s principle applied to avionics Venturi airfoil analogy Credits Bernoulli's Principle

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Daniel Bernoulli (Groningen, 8 February 1700 – Basel, 8 March 1782) was a Dutch-Swiss mathematician and was one of the many prominent mathematicians in the Bernoulli family. He is particularly remembered for his applications of mathematics to mechanics, especially fluid mechanics, and for his pioneering work in probability and statistics. Bernoulli’s work is still studied at length by many schools of science throughout the world. Daniel Bernoulli 1700-1782

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The pressure of a fluid ( liquid or gas ) decreases at points where the speed of the fluid increases. Bernoulli’s principle In other words, Bernoulli found that within the same fluid, in this case air, air speed flow is associated with low pressure, and low speed flow with high pressure.

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A venturi tube is used to demostrate Bernoulli’s Principle

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An important application of this principle is found in aeronautics to give lift to the wing of an airplane. It can be seen that an aircraft wing is similar in shape to an half of a Venturi tube. With this configuration, the air molecules moving over the curved upper surface have a longer distance to travel. Therefore, they have to move faster to keep pace with the molecules moving along the bottom of the wing. The acceleration of the air above the airfoil, according to Bernuolli’ s Principle, causes a lower pressure. Simultaneously, the impact of the slower air on the lower surface of the airfoil increases the pressure below. This combination of pressure decrease above and pressure increase below produces lift. Bernoulli’s principle applied to avionics

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High Speed Venturi - airfoil analogy Low Speed = Low Pressure = High Pressure

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Project Supervisor Prof. Ian Lahey Project Creators Mr Giacomo Calligaris Mr Simone Covassi Mr Luigi Maronese School: Technical Istitute for Aeronautics ERSAS A. Volta (UD) Italy www.centrostudivolta.it Credits