@Article{IJNAMB-2-42, author = {C. Wen and T.-Z. Huang}, title = {Two-Level Methods Based on three Corrections for the 2D/3D Steady Navier-Stokes Equations}, journal = {International Journal of Numerical Analysis Modeling Series B}, year = {2011}, volume = {2}, number = {1}, pages = {42--56}, abstract = {Two-level finite element methods are applied to solve numerically the 2D ⁄ 3D steady Navier-Stokes equations if a strong uniqueness condition (\frac{\|f\|_{-1}}{\|f\|_0})^\frac{1}{2}\leq\delta=1-\frac{N\|F\|_{-1}}{\nu^2} holds, where N is defined in (2.4)-(2.6). Moreover, one-level finite element method is applied to solve numerically the 2D/3D steady Navier-Stokes equations if a weak uniqueness condition 0<\delta<(\frac{\|f\|_{-1}}{\|f\|_0})^\frac{1}{2} holds. The two-level algorithms are motivated by solving a nonlinear problem on a coarse grid with mesh size H and computing the Stokes, Oseen and Newton correction on a fine grid with mesh size h << H. The uniform stability and convergence of these methods with respect to  and grid sizes h and H are provided. Finally, some numerical tests are made to demonstrate the effectiveness of one-level method and the three two-level methods.}, issn = {}, doi = {https://doi.org/}, url = {http://global-sci.org/intro/article_detail/ijnamb/298.html} }