  We connect an appropriate feedback loop to a model of 2D vertical eddy of
airflow which unfolds a wide range of vorticity behavior. Computational fluid
dynamics of the twisted roll display a class of long lifespan 3D vortices. On
the one hand, the infinitely stable columnar vortex simulated describes
waterspouts and tornadoes with extended lifetime. On the other hand, a light
modification of the retroaction exhibits strong similarities to tropical
cyclones. Moreover, we investigate the outcome of the twisting process
vertically shifted. This modelisation leads to the simulation of simultaneous
vortices associated to this other class of 3D vortices with short lifespan. Our
heuristic dynamical systems lay the foundations of a comprehensive modelisation
of vortices since it joins theory and numerical simulations.
