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Updating preconditioners for permuted non-symmetric linear systems
On Low Mach Number Preconditioning of Finite Volume Schemes
Designing optimal smoothers for multigrid methods for unsteady flow problems
We consider the solution of unsteady flow problems using multigrid methods. There, the typical solver comes from a dual time stepping approach, where an existing method designed for a steady problem is used for unsteady flows. This design mismatch leads to a significant decrease in convergence speed. Here, we will use the linear advection equation as a model problem to find optimal Runge-Kutta smo