Instability in the sink

Yesterday at the lab I was intrigued to find regular patterning of ink in the most unexpected places – at the sink, whilst cleaning up between experiments using perspex sheets. Luckily my camera was still close by .. here are a couple of examples:

making-tiny-waves.jpg

‘Making tiny waves’ – I think this patterning is called Kelvin-Helmholtz Instability – will check with those who know later on this week!

ink-dropping-from-a-height.jpg

Ink dropping from a height and forming regular patterning

These striped patterns seemed remarkably well-defined and stable, like marbling.

Below are some natural textures formed using perspex:

treescape.jpg

Treescape

ferns-and-fronds.jpg

Ferns and fronds

a-slice-of-agate.jpg

A slice of agate

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