Coanda effect

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Coanda effect

a phenomenon of fluid movement similar to the Bernoulli effect in which passage of a stream of gas next to a wall results in a pocket of turbulence between the wall and the gas flow. The turbulence forms a low-pressure bubble that makes the gas stream adhere to the wall. The principle is used in fluidic ventilators.

Coanda,

Henri-Marie, Romanian aerodynamicist, 1885-1972.
Coanda effect - a stream of air or fluid emerging from a nozzle follows a nearby curved surface if the angle of curve is not too sharp.