Fr\'ed\'eric Haldi, Peter Wittwer Leading order down-stream asymptotics of non-symmetric stationary Navier-Stokes flows in two dimensions (92K, LaTeX) ABSTRACT. We consider stationary solutions of the incompressible Navier-Stokes equations in two dimensions. We give a detailed description of the fluid flow in a half-plane through the construction of an inertial manifold for the dynamical system that one obtains when using the coordinate along the flow as a time.