Video of the interface in a matched-density, rotating Couette flow. (taken by R. M. Roberts)
(These movies are a bit dark and you may get better results by increasing the brightness of your monitor.)
1. Solitary waves, l=5.0 cm, inner depth = 0.67 cm, plate speed = 56.8 cm/s.
2. Roll waves and formation of sheets, inner depth = 0.55 cm, plate speed = 56.8 cm/s. The thicker outer depth allows sheet formation.
3. Roll waves and formation of sheets, inner depth = 0.49 cm, plate speed = 49.7 cm/s. The depth of the outer fluid is increased again and now a very long sheet is formed.
4. Atomization, inner depth = 0.50 cm, plate speed = 85.2 cm/s. Pinch-off occurs near the end. Note that this video is "flipped" compared to the others Sorry.
Still Images(taken by R. M. Roberts)
Sides from the talk, Mechamism of Atomization in a two-layer Couette Flow, contain several images from the above videos at better resolution.