In this article we study the connection between the topological defects (singularities of the velocity eld) inside a region with recirculating viscous ow past an arbitrary blunt body (wake bubble). The topological de- fects in the wall of the blunt body and inside the bubble form a circuit or net, where the viscous steady dynamic is developed. The primary motivation is to understand the structure of this connection for several known types of two-dimensional incompressible flows. Keywords Poincare-Hopf Topological defect cylinder flow