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The optimal shape of the faucet opening.

drawing of a triangular faucet opening.


Starting from a slightly tweaked circle, calculations by Harvard's Henry Chen and Michael Brenner showed that more triangular shapes made better faucets and that a sort-of "sucked-in triangle" was the optimal faucet.

Credit: H.H. Chen and M.P. Brenner, Harvard University

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Related story: Triangles, Not Circles, Make Optimal Faucets