"Stationary corner vortex configurations"

Given a stable configuration of point vortices for steady two dimensional inviscid, incompressible fluid flow in a domain D it is shown that there is another stable configuration of stationary point vortices in D with vortices near the original vortices plus additional vortices near any of the convex corners of D. It follows that there are steady flows which have a finite sequence, of arbitrary length, of vortices of alternating sign descending into any convex corner of D. Several computed examples are given.