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Coandă effect

From Wiktionary, the free dictionary

English

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A spinning ping pong ball is held in a diagonal stream of air by the Coandă effect. The ball "sticks" to the lower side of the air stream, which stops the ball from falling down. The jet as a whole keeps the ball some distance from the jet exhaust, and gravity prevents it from being blown away.

Etymology

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Named after Romanian aerodynamics pioneer Henri Coandă, who was the first to recognize the practical application of the phenomenon in aircraft development.

Proper noun

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Coandă effect

  1. The tendency of a fluid jet to be attracted to a nearby surface.