triangulationblog:

Beautiful World of Fluid Dynamics

Bouncing Jet: Normally, when you pour a liquid into a pool of another liquid, the stream plunges right in. But if that pool is moving when the liquid hits it, the stream can actually bounce along a thin layer of air just above the pool’s surface.

In the image above, silicone oil is poured into a moving bath of the same liquid. When the stream hits the air layer above the pool, the weight of the stream bends the pool’s surface like a rubber band — surface tension keeps the stream from punching through the top of the pool. The oil then bounces up out of the little dip it’s created and arcs over the pool.

(via andreeww)