Robust and scalable finite element domain decomposition solvers for CEM

We outline a scalable and robust finite element Domain Decomposition Method (DDM) in Computational Electromagnetics (CEM). The methodology is based on the effective and efficient preconditioning of the Finite Element Tearing and Interconnecting (FETI) matrix via a fully algebraic, local preconditioner called the Locally Exact Algebraic Preconditioner (LEAP), combined with a global macro-basis multi-grid on interfaces, called the MultiGrid-FETI (MG-FETI). Results for a variety of challenging industrial-grade models showcase the robustness, scalability and efficiency of the method.