Pictures of the graph of the stream functions of Oseen's stationary flows

Stationary Navier-Stokes flows in the whole plane with a singularity at the origin. Mode =1.

The same as the previous flow but a different visualization.

Stationary Navier-Stokes flow in the whole plane with a singularity at the origin. Mode =3.

The same but with a different viewpoint.

See my paper "Location of sigularities in inviscid limit -- numerical examples", in Navier-Stokes equations: theory and numerical methods ( ed. R. Salvi ), (1998), pp. 220--236.