In this work we show a visualization of vortices generated by nozzles of different geometries (circular, flat and triangular).
This was done both in a lateral view and in various frontal cross sections along the trajectory of each vortex. It is observed that the vortices generated by the flat and triangular nozzles tend to evolve to a circular vortex, even when they seem unstable along the path. For the flat nozzle, the vortex tends to be axisymmetric after 51mm and for the triangular nozzle after 61 mm.
In the frontal view we observed that the internal structure of the vortices is very complicated, apparently smaller vortices of different sizes are generated and destroyed.