Abstract
We present a Boundary Element Method (BEM)-based FEM for mixed formulations of second order elliptic problems in two dimensions. The challenge, we would like to address, is a proper construction of \(\mathbf H(\mathrm {div})\)–conforming vector valued trial functions on arbitrary polygonal partitions of the domain. The proposed construction generates trial functions on polygonal elements which inherit some of the properties of the unknown solution. In the numerical realization, the relevant local problems are treated by means of boundary integral formulations. We test the accuracy of the method on two model problems.
Keywords
- Mixed formulation
- BEM-based FEM
- Polygonal mesh
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Acknowledgments
The research of Y. Efendiev, J. Galvis, and R. Lazarov has been supported in parts by award KUS-C1-016-04, made by King Abdullah University of Science and Technology (KAUST). R. Lazarov is also supported in part by the award made by NSF DMS-1016525. Y. Efendiev would like to acknowledge a partial support from NSF (724704, 0811180, 0934837) and DOE.
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Efendiev, Y., Galvis, J., Lazarov, R., Weißer, S. (2014). Mixed FEM for Second Order Elliptic Problems on Polygonal Meshes with BEM-Based Spaces. In: Lirkov, I., Margenov, S., Waśniewski, J. (eds) Large-Scale Scientific Computing. LSSC 2013. Lecture Notes in Computer Science(), vol 8353. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-43880-0_37
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DOI: https://doi.org/10.1007/978-3-662-43880-0_37
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