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Bernoulli's principle

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Bernoulli's principle states that in fluid flow, an increase in velocity causes a decrease in pressure. It was discovered by the Swiss mathematician/scientist Daniel Bernoulli. For a mathematical formulation, see Bernoulli's equation.

A popular explanation of how an airfoil[?] develops lfit relies upon the pressure differential above and below a wing. However, this pressure difference does not induce enough lift via Bernoulli's principle (see Coanda Effect).

Another important application is cavitation, or the prevention of such. As an example, a propeller rotating at high speed may cause the local water (or other fluid) pressure to reduce sufficiently that dissolved gases can come out of solution, producing bubbles[?]. When these collapse, pitting occurs on the face of the propeller, and noise results. This latter may be detected by means of sonar.



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