The two following videos show the stabilization of a fluid flow around a circular cylinder in the case of a Reynolds numer equal to 80 and the two control zones correspond to +/- [65°,75°]:

Simulations with and without feedback and a perturbation of small size ctrl_cont

Simulation corresponding to a large perturbation. The stabilization is obtained after some time ctrl_large

The two following videos show the stabilization of a fluid flow around a circular cylinder in the case of a Reynolds numer equal to 150. The control location is optimzed and the two control zones correspond to +/- [90°,100°]:

Simulation corresponding to a boundary perturbation localized in time re150_stab

Simulation corresponding to a boundary perturbation multiplied by a sinus function in time re150_stab_cont

These movies have been realized by Jessie Weller during her post-doctorate.