Flowery Splashes

A disk with wedges on its surface generates a flower-like splash

Plunge a disk into water and you’ll get a dome-like splash that closes back on itself. But what happens when that disk has a patterned surface? In this video, researchers added a wedge-like surface pattern to the disk, creating a splash with petals like a flower. Just as the surface of disk is about to submerge completely, a jet of the remaining air spurts out the trough of each wedge. This air jet breaks up the tip of the triangular splashes focused by the wedge. (Image, research, and video credit: H. Kim et al.)

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