Spiral-vortex structure excited in differentially rotating shallow water

spiral-vortex structure

Black (white) parts of the pattern are the elevations (depressions) of the shallow water. Number of trailing spiral waves of surface density is equal m=3. The camera rotates with the pattern. White lines show the motion of particles. The experiments have revealed banana-like anticyclonic vortices between the spiral arms in corotation region, drifting together with the spiral arms around the vessel axis, so that the joint spiral-vortex structure is formed.

References to this figure:

Nezlin M.,Rulov A., Snezhkin E. N., Trubnikov A. S., , Self-organizaion of spiral-vortex structures in shallow water with repid differenial rotation, Sov.Phys.JETP, 1987, v.65(1), pp.1-4.
Nezlin M., Snezhkin E. N., , Rossby Vortices, Spiral Structures, Solitons, Springer-Verlag, Berlin, Heidelberg, 1993
Nezlin M.V. , Modeling of the Generation of Spiral Structure by Laboratory Experiments in Rotating Shallow Water, and Prediction of Interarm Anticyclones in Galaxies, In Proc. "Physics of the Gaseous and Stellar Disks of the Galaxy", SAO, 22-25 September 1993, Russia, ed. I.R.King, ASP Conference Series, 66, pp. 135-151, 1994.

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