HY and BEND detail
This image detail is made up of small pictures which are themselves details of the Fluids lab where I work at the Uni .. then assembled in Mathematica into a bigger picture … the answer’s hanging on the wall in the Harrison Building, Exeter University!
Below are a couple of examples which include further work with my wonderful soap film generator. The first one shows an area about A4 size. Its vortex patterning, where upflow and downflow merge, has an Escher-ish quality, where patterns and their inverse shapes fit together like a jigsaw.
The obliquity of the ecliptic