A Parameterized Splitting Preconditioner for Generalized Saddle Point Problems

Table 11

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	norm(𝐶,fro)/20	7	0.0238	0.0286	0.0524
32×32	norm(𝐶,fro)/20	7	0.0850	0.0552	0.1402
64×64	norm(𝐶,fro)/20	11	0.8400	0.3177	1.1577
128×128	norm(𝐶,fro)/20	16	6.9537	2.2306	9.1844