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Figure 5. Time dependence of kinetic energy, enstro-phy, and palinstrophy with respect to their initial values for experiments with the vorticity strength ratio (y = 5), skirt parameter (a = 1), vortex radius ratio r =1/3 and the dimensionless gap A/Ri = 2.5. The diffusivity v employed are 3.25 m2 s~1 and 6.5 m2s _1. Note that the palinstrophy (kinetic energy and enstrophy) scale is in the left (right) ordinate. The curves with higher values are the 3.25 m2 s~1 case.

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