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A parallel computational framework of finite element domain decomposition method (FE-DDM) is presented. Specifically, the randomized computation of domain Dirichlet-to-Neumann (DtN) operators and a robust randomized-based W-FETI preconditioning technique are integrated in a parallel implementation. Numerical examples are given to show the parallel scalability, accuracy and efficiency of the presented...
An effective, efficient and robust algebraic global preconditioner for the FETI-2λ Domain Decomposition Method (DDM) is proposed. The new preconditioner is based on the Woodbury matrix identity, termed as W-FETI, and is inspired by the observation that under certain circumstances the discrete Diritch-to-Newmann (DtN) operators of the domains are rank deficient. Numerical examples showcase the excellent...
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