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# Vatistas vortices

The mathematical model for the velocity in the radial direction (Θ) for the family of Vatistas vortices is:

$V_\Theta\ (r) = \frac{\Gamma}{2\pi r_c} \frac{r}{r_c \left (1+ \left (\frac{r}{r_c} \right )^{2n}\right )^\frac{1}{n}}$