An Alternative HSS Preconditioner for the Unsteady Incompressible Navier-Stokes Equations in Rotation Form

Table 1

Results for 2D unsteady Oseen problem different values of 𝛼 (exact solves) and 𝜈=0.1.

Grid	𝛼=10	𝛼=20	𝛼=50	𝛼=100
8×8	7	5	4	3
16×16	8	6	4	4
32×32	8	6	5	4
64×64	8	6	5	4
128×128	8	6	5	4