Swirls and whorls ... vortex time!

A few whirlpools from the lab today. I've made some movies too, and it's fascinating to watch the different speeds of flow, visualized by the different coloured inks.   It's also interesting to watch the slower-flow vortices form around the main one.  I'll post some footage when it's prepared.

'The source of pattern inspiration'

'Psychedelic spiral' 

'Green spin machine'

'Feathered complexity'