Asymptotic behavior of solutions of the stationary Navier-Stokes equations in an exterior domain

In this paper we are interested in the asymptotic behavior of an incompressible fluid around a bounded obstacle. The problem is described by the stationary Navier-Stokes equations in an exterior domain in ℝⁿ with n ≥ 2. We will show that under some assumptions, any nontrivial velocity field obeys a minimal decaying rate exp(-Ct² log t) at infinity. Our proof is based on appropriate Carleman estimates.