At time 44, we see the same kind of turbulent signature, in which a wisp of vortical fluid curls around a region of vortical and irrotational flow, undercut by a thin channel of irrotational flow.

As they mix, momentum differences are smoothed out. This process is superficially similar to the action of viscosity which tends to smooth out momentum gradients by molecular interactions, and ...

A laminar boundary layer has less momentum near the wall than a turbulent boundary layer, as shown in figure 4, because turbulence is a very effective mixing process. More importantly, turbulent ...