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- W3104855561 abstract "We study a method based on Balancing Domain Decomposition by Constraints (BDDC) for a numerical solution of a single-phase flow in heterogenous porous media. The method solves for both flux and pressure variables. The fluxes are resolved in three steps: the coarse solve is followed by subdomain solves and last we look for a divergence-free flux correction and pressures using conjugate gradients with the BDDC preconditioner. Our main contribution is an application of the adaptive algorithm for selection of flux constraints. Performance of the method is illustrated on the benchmark problem from the 10th SPE Comparative Solution Project (SPE 10). Numerical experiments in both 2D and 3D demonstrate that the first two steps of the method exhibit some numerical upscaling properties, and the adaptive preconditioner in the last step allows a significant decrease in number of iterations of conjugate gradients at a small additional cost." @default.
- W3104855561 created "2020-11-23" @default.
- W3104855561 creator A5045822206 @default.
- W3104855561 date "2019-04-23" @default.
- W3104855561 modified "2023-09-25" @default.
- W3104855561 title "On adaptive BDDC for the flow in heterogeneous porous media" @default.
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- W3104855561 doi "https://doi.org/10.21136/am.2019.0222-18" @default.
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