A Parameterized Splitting Preconditioner for Generalized Saddle Point Problems

Table 10

Preconditioned GMRES(20) on steady Oseen problems with different grid sizes (uniform grids), viscosity 𝑣=0.1.

Grid	𝛼	its	LU time	its time	Total time
16×16	norm(𝐶,fro)/20	10	0.0250	0.0302	0.0552
32×32	norm(𝐶,fro)/20	10	0.0816	0.0832	0.1648
64×64	norm(𝐶,fro)/20	12	0.8466	0.3648	1.2114
128×128	norm(𝐶,fro)/20	14	6.9019	2.0398	8.9417