The Sprinkler Solution: A Tale of Fluid Dynamics and Fanciful Fixtures For decades, physicists have struggled to understand how sprinklers work, particularly when operating in reverse.
Specifically, what drives their rotation when drawing water into their arms instead of pushing it outward? This question, known as Feynman's Sprinkler Problem, has become a legendary challenge in fluid dynamics.
The solution lies in the momentum of flowing water, which drives the rotation of both normal and reverse sprinklers.