Download e-book for iPad: Domain Decomposition Methods in Science and Engineering by Olof Widlund, David Keyes

By Olof Widlund, David Keyes

ISBN-10: 3540344683

ISBN-13: 9783540344681

Domain decomposition is an lively learn quarter interested in the advance, research, and implementation of coupling and decoupling options in mathematical and computational types of common and engineered platforms. the current quantity units forth new contributions in components of numerical research, computing device technological know-how, clinical and business purposes, and software program development.

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Zikatanov optimizing the right hand side of (17), CR, and the optimal e (optimal for the norm |||·|||A ), are also subject to an ongoing research. Currently in the numerical experiments we use an error component, e, obtained during the CR iteration. 6 Numerical Results We consider several problems of varying difficulty to demonstrate the effectiveness of our approach. Our test problems correspond to the bilinear finite element discretization of −∇ · D(x, y)∇u(x, y) = f u(x, y) = 0 in on Ω = [0, 1] × [0, 1] ∂Ω (18) (19) on a uniform rectangular grid.

See also the discussion on page 17 of [23]. 4 Two-Level Additive Schwarz Preconditioner To obtain scalability for the additive Schwarz overlapping domain decomposition preconditioner, Dryja and Widlund [10] developed a two-level preconditioner by introducing a coarse space. Lower Bounds in Domain Decomposition 31 Let TH be a coarse triangulation of Ω obtained by adding diagonals to the underlying nonoverlapping squares whose sides are of length H (cf. the second figure in Figure 1) and VH ⊂ H01 (Ω) be the corresponding P1 finite element space.

4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. J. Brannick and L. Zikatanov , Generally highly accurate algebraic coarsening, Electron. Trans. Numer. , 10 (2000), pp. 1–20. J. Brannick, M. Brezina, S. MacLachlan, T. Manteuffel, S. McCormick, and J. Ruge, An energy-based AMG coarsening strategy, Numer. , 12 (2006), pp. 133–148. J. Brannick and R. Falgout, Compatible relaxation and coarsening in algebraic multigrid. In preparation. M. Brezina, A. J. Cleary, R. D. Falgout, V. E. Henson, J.

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Domain Decomposition Methods in Science and Engineering by Olof Widlund, David Keyes

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