Fig. 2: Velocity distributions for the background case (without the elliptical cylinder), object-existed case that only an elliptical cylinder exists in the freestream, and cloak case when hydrodynamic cloaks are applied on the object-existed case.
From: On-demand zero-drag hydrodynamic cloaks resolve D'Alembert paradox in viscous potential flows
a, b, c Superposition of the experimental streamlines (black lines) with the numerical velocity vectors (magenta arrows) for the three cases. d, e, f Simulation results regarding velocity distributions of three cases superimposed with streamlines (black color) and isobar (white color)
