Abstract
We present a parallel preconditioner based on the domain decomposition for the finite element discretization of multiscale elliptic problems in 3D with highly heterogeneous coefficients. The proposed preconditioner is constructed using an abstract framework of the Additive Schwarz Method which is intrinsically parallel. The coarse space consists of multiscale finite element functions associated with the wire basket, and is enriched with functions based on solving carefully constructed generalized eigen value problem locally on each face. The convergence rate of the Preconditioned Conjugate Method with the proposed preconditioner is shown to be independent of the variations in the coefficients for sufficient number of eigenfunctions in the coarse space.
L. Marcinkowski—This work was partially supported by Polish Scientific Grant 2011/01/B/ST1/01179 and Chinese Academy of Science Project: 2013FFGA0009 - GJHS20140901004635677.
T. Rahman—The author acknowledges the support of NRC through the DAADppp project 233989.
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Marcinkowski, L., Rahman, T. (2016). Schwarz Preconditioner with Face Based Coarse Space for Multiscale Elliptic Problems in 3D. In: Wyrzykowski, R., Deelman, E., Dongarra, J., Karczewski, K., Kitowski, J., Wiatr, K. (eds) Parallel Processing and Applied Mathematics. Lecture Notes in Computer Science(), vol 9574. Springer, Cham. https://doi.org/10.1007/978-3-319-32152-3_32
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