Aggregation-Based Algebraic Multigrid for Convection-Diffusion Equations
Aggregation-Based Algebraic Multigrid for Convection-Diffusion Equations
We consider the iterative solution of large sparse linear systems arising from the upwind finite difference discretization of convection-diffusion equations. The system matrix is then an M-matrix with nonnegative row sum, and, further, when the convective flow has zero divergence, the column sum is also nonnegative, possibly up to a …