Elastic turbulence
with Kalliroscope flakes
Snapshots of the elastic turbulence in a flow between two plates, (Groisman and Steinberg, Nature 2000). The Weissenberg number was 6.5 for the upper row and 13 for the lower row. The Reynolds number was below unity. The rotating upper plate was black. Its radius was 38 mm and the gap between the plates was 10 mm. The working liquid, an elastic polymer solution, was seeded with light reflecting Kalliroscope flakes. The flow was illuminated and photographed through the stationary transparent lower plate.