Multigrid solvers for immersed finite element methods and immersed isogeometric analysis
Multigrid solvers for immersed finite element methods and immersed isogeometric analysis
Ill-conditioning of the system matrix is a well-known complication in immersed finite element methods and trimmed isogeometric analysis. Elements with small intersections with the physical domain yield problematic eigenvalues in the system matrix, which generally degrades efficiency and robustness of iterative solvers. In this contribution we investigate the spectral properties …