Solution to Feynman's reverse sprinkler puzzle also applies to "silly sprinklers"

a sprinkle of science Solution to Feynman’s reverse sprinkler puzzle also applies to “silly sprinklers” New study confirms 2024 “momentum flux theory” on how angular momentum of water flows drives rotation.

11 Credit: NYU's Applied Mathematics Laboratory Credit: NYU's Applied Mathematics Laboratory Text settings Story text Size Small Standard Large Width * Standard Wide Links Standard Orange * Subscribers only Learn more Minimize to nav Watering your lawn in the summer can be both pragmatic and fun with so-called “ silly sprinklers ,” designed to create amusing loops and spirals of water jets. And there’s some fascinating physics at work to boot. Researchers at New York University’s Courant Institute conducted a series of experiments with different silly sprinkler designs to find the answer to a longstanding problem in fluid dynamics, according to a new paper published in the Proceedings of the National Academy of Sciences.