A Parameterized Splitting Preconditioner for Generalized Saddle Point Problems

Table 3

Preconditioned GMRES(20) on steady Oseen problems with different grid sizes (uniform grids), viscosity 𝑣=0.01.

Grid	𝛼	its	LU time	its time	Total time
16×16	0.0001	2	0.0442	0.0236	0.0678
32×32	0.0001	3	0.4160	0.0557	0.4717
64×64	0.0001	3	7.3645	0.2623	7.6268
128×128	0.0001	4	169.4009	3.1709	172.5718