A Parameterized Splitting Preconditioner for Generalized Saddle Point Problems

Figure 1

Spectrum of the preconditioned steady Oseen matrix with viscosity coefficient 𝑣=0.1,32×32 grid. (a) Q2-Q1 FEM, 𝐶=0; (b) Q1-P0 FEM, 𝐶≠0.

(a)

(b)