Research Article

Incomplete Augmented Lagrangian Preconditioner for Steady Incompressible Navier-Stokes Equations

Table 3

GMRES iterations with incomplete AL preconditioner for steady Oseen problems (uniform grids, Q2-Q1 FEM, and Newton). The optimal is in parentheses.

Grid Viscosity
0.1 0.01 0.005 0.001

11 (1.0)11 (0.08)12 (0.06)19 (0.03)
14 (1.0)12 (0.08)14 (0.05)26 (0.03)
14 (1.0)12 (0.08)14 (0.05)29 (0.03)
14 (1.0)12 (0.08)14 (0.05)42 (0.03)