Multigrid Methods

Principle

Multigrid methods are highly efficient numerical techniques for solving partial differential equations (PDEs) by employing a hierarchy of computational grids. The core principle involves performing calculations on coarser grids to smooth out low-frequency errors quickly, then transferring these corrections to finer grids for higher-frequency error reduction. This iterative process accelerates convergence significantly compared to single-grid methods. It offers a powerful approach to numerical problem-solving.