摘要

This paper presents one-level and two-level iterative penalty finite element methods to approximate the solutions of steady Navier-Stokes equations. First, one-level iterative penalty finite element method is applied to solve the steady Navier-Stokes equations numerically, and its H-1 and L-2 error estimates are derived. Then, two-level iterative penalty scheme is given and its error estimates are obtained for velocity and pressure. Finally, the numerical results are displayed to verify the theoretical analysis.