Abstract
We are interested in a robust and accurate domain decomposition algorithm with interface conditions of Robin type on non-matching multiblock grids using a cell functional minimization scheme, which has a good performance on non-orthogonal meshes. In order to treat the non-matching grids at the interface, we introduce the \(L^2\) projection operator to ensure weak continuity of the primary unknown and of the normal flux across the non-matching interface. Furthermore, we prove the wellposedness of local and global problems and obtain as well an error estimate of first order in a discrete \(H^{1}\)-norm only using the \(L^{2}\) projection operator on the non-matching interface, as done in the matching case. Numerical results are presented in confirmation of the theoretical results.
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The authors thank the anonymous reviewers for their carefully readings and many useful suggestions.
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This work is supported by the National Natural Science Foundation of China (No. 11271053, 91118001, 11135007), the Science Foundation of China Academy of Engineering Physics (No. 2011A0202012, 2013B0202034) and a grant from the Laboratory of Computational Physics.
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Yin, L., Wu, J. & Yao, Y. A cell functional minimization scheme for domain decomposition method on non-orthogonal and non-matching meshes. Numer. Math. 128, 773–804 (2014). https://doi.org/10.1007/s00211-014-0623-3
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DOI: https://doi.org/10.1007/s00211-014-0623-3