Existence of steady Navier-Stokes flows exterior to an infinite cylinder (2310.09752v2)

Abstract: We consider the 3D steady Navier-Stokes system on the exterior of an infinite cylinder under the action of an external force. We are concerned with the class of solutions in which the velocity field is vertically uniform and at rest at horizontal infinity. This configuration includes the 2D exterior problem for the steady Navier-Stokes system known to have characteristic difficulties. We prove the existence of solutions in the above class for a given nonsymmetric external force with suitable decay. The proof can be adapted to the 2D problem and gives a generalization of H. (2023) in view of the regularity of solutions.