The Finiteness of vortices in steady incompressible viscous fluid flow
  In this work, we provide two novel approaches to show that incompressible fluid flow in a finite domain contains at most a finite number vortices. We use a recently developed geometric theory of incompressible viscous flows along with an existing mathematical analysis concept to establish the finiteness. We also offer a second proof of finiteness by roping in the Kolmogorov's length scale criterion in conjunction with the notion of diametric disks. 
Jiten C. Kalita, Sougata Biswas and Swapnendu Panda
physics.flu-dyn