A Comparison of Three Solvers for the Incompressible Navier-Stokes Equations
نویسندگان
چکیده
Three solvers for saddle point problems arising from the linearization and discretization of the steady state incompressible Navier–Stokes equations are numerically studied. The numerical tests are based on nonconforming finite element approximations of lowest order in two–dimensional domains using isotropic meshes. The investigated solvers are coupled multigrid methods with Vanka–type smoothers, flexible GMRES with a block–diagonal preconditioner proposed by Vassilevski and Lazarov (1996), and flexible GMRES with a coupled preconditioner which is based on an algebraic multigrid method.
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