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Showing 1 to 5 of 5 for “"smoothed aggregation"”.
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Generalizing smoothed aggregation-based algebraic multigrid
Smoothed aggregation-based (SA) algebraic multigrid (AMG) is a popular and effective solver for systems of linear equations that arise from discretized partial differential equations. While SA has been effective over a broad class of problems, it has several limitations and weaknesses that this …
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Multigrid methods for complex engineering geometries and unstructured meshes
… (AMG), including both classical AMG and smoothed aggregation AMG. It is suggested that the high frequency error produced by the smoother propagates outward the low quality region on the fine grid to the neighbouring areas on the coarse grid. An algorithm to track low quality regions on …
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Data parallel algebraic multigrid
… this dissertation we analyze and decompose the smoothed aggregation algebraic multigrid method into parallel primitives effectively mapped to emerging architectures. Our formulation is performed in two phases, the first building on high-level generic abstractions to construct our solver in a …
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Performance of Algebraic Multigrid for Parallelized Finite Element DNS/LES Solvers
… cost using multiple solvers: direct sparse LU, smoothed aggregation AMG, and single-level ILUT preconditioned GMRES; and on two supercomputers of different memory architecture(distributed and shared memory). This study revealed Fourier space partitioning outperforms physical space partitioning …
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Learning aggregates and interpolation for algebraic multigrid
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms