Summary:
- Researchers have utilized high-speed imaging and fluid dynamics modeling to finally solve the long-standing "teapot effect," which describes why liquid tends to dribble down the side of a spout rather than pouring cleanly.
- The study identifies that the effect is driven by the interplay between capillary forces, gravity, and the wettability of the spout surface, demonstrating that it can be mitigated by controlling the contact angle of the liquid at the spout's edge.