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Coandă effect
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<p>The Coandă effect is the tendency of a <a href="/facts/Jet_(fluid)/Ebx8zVKY">fluid jet</a> to stay attached to a surface of any form. <i><a href="/facts/Merriam-Webster/yEt22M9H">Merriam-Webster</a></i> 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." </p><p>It is named after Romanian inventor <a href="/facts/Henri_Coand%25C4%2583/ID5lWhoC">Henri Coandă</a>, who was the first to recognize the practical application of the phenomenon in aircraft design around 1910. It was first documented explicitly in two patents issued in 1936. </p>