格致

Scientists of the University of Twente in The Netherlands won a prestigious place in the 'Hall of Fame' of videos about fluid-in-motion. They have made a video of leaping shampoo, in which they explain the so-called Kaye effect. Scientifically interesting but also of great aesthetic beauty!

英国工程师 Alan Kaye 于 1963 年发现的一个现象。如果从高处倒下香波之类黏性液体，下方的表面会突然间喷出一束液体。后来人们发现，这种现象对于 shear-thinning （剪切稀释，谢谢 sandycx）的液体很平常。Shear thinning 指的是某些液体在剪切速率增大的情况下，黏性会变小。像番茄酱，洗发香波，血液之类都属于这类液体。

这种现象肉眼不大容易看到，因为很少持续超过 300 毫秒。

链接：
Wikipedia: Kaye effect
Leaping shampoo and the stable Kaye effect