Coandă effect
Tendency of a fluid jet to stay attached to a convex surface / From Wikipedia, the free encyclopedia
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The Coandă effect (/ˈkwɑːndə/ or /ˈkwæ-/) is the tendency of a fluid jet to stay attached to a convex surface.[1] Merriam-Webster describes it as "the tendency of a jet of fluid emerging from an orifice to follow an adjacent flat or curved surface and to entrain fluid from the surroundings so that a region of lower pressure develops."[2]
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It is named after Romanian inventor Henri Coandă, who was the first to recognize the practical application of the phenomenon in aircraft design around 1910.[lower-alpha 1][3] It was first documented explicitly in two patents issued in 1936.