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A black-box iterative solver based on a two-level Schwarz method
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DOI：10.1007/s006070050033.png)
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Abstract
En 中文
We propose a black-box parallel iterative method suitable for solving both elliptic and certain nonelliptic problems discretized on unstructured meshes. The method is analyzed in the case of the second order elliptic problems discretized on quasiuniform P1 and Q1 finite element meshes. The numerical experiments confirm the validity of the proved convegence estimate and show that the method can successfully be used for more difficult problems (e.g. plates, shells and Helmholtz equation in high-frequency domain).
Keywords:
algebraic multigrid
unstructured meshes
automatic coarsening
overlapping Schwarz methods
smoothed aggregations