Abstract
We design and analyze multigrid methods for the saddle point problems resulting from Raviart–Thomas–Nédélec mixed finite element methods for the Darcy system in porous media flow. Uniform convergence of the W-cycle algorithm in a nonstandard energy norm is established. Extensions to general second order elliptic problems are also addressed.
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Acknowledgements
The authors would like to thank Monique Dauge for helpful discussions on the regularity of the Darcy system. Portions of this research were conducted with high performance computational resources provided by Louisiana State University (http://www.hpc.lsu.edu).
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The work of the authors Susanne C. Brenner and Li-Yeng Sung was supported in part by the National Science Foundation under Grant Numbers DMS-13-19172 and DMS-16-20273.
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Brenner, S.C., Oh, DS. & Sung, LY. Multigrid methods for saddle point problems: Darcy systems. Numer. Math. 138, 437–471 (2018). https://doi.org/10.1007/s00211-017-0911-9
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DOI: https://doi.org/10.1007/s00211-017-0911-9