This is one notable entry to an engineering photographic competition.
It has nothing to do with fish or Danish designers!
http://www.eng.cam.ac.uk/photocomp/2008/sjj37_1.shtml
This is just a cut and paste...
.. because, in truth, the whole thing doesn't make a lot of sense to me
"Sungjune Jung
'Fishtail in the green sea'
This image, taken using a Nikon D40X with a 105mm lens and a Xenon flash lamp with ~1us duration, shows one of the flow structures generated from the collision of two impinging jets with radius of 420um. The rapid flash illumination reveals a fish-like formation for dilute polymer fluids: the oval sheet with rims corresponds to the fish head, drops on thin ligaments to its body, and bigger free drops at the end to its tail. The viscoelasticity of the polymer in the fluid resists detachment of the drops from the ligament. This image was adjusted for hue and contrast, and rotated by 90 degrees for effect."
However it is VERY small - the radius of each jet is less than half a millimetre (and for those who prefer to work in feet and inches that's less than 20 thousandths of an inch.). This is very advanced fluid mechanics and I wasn't great at undergraduate fluid mechanics and I've scarcely thought about it for a year or two....
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