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Numerical Upscaling via the Wave Equation with Perfectly Matched Layers
Mälardalen University, School of Education, Culture and Communication, Educational Sciences and Mathematics.ORCID iD: 0000-0003-4481-0964
2022 (English)In: Springer Proc. Math. Stat., Springer , 2022, p. 689-702Conference paper, Published paper (Refereed)
Abstract [en]

One of the main ingredients of existing multiscale numerical methods for homogenization problems is an accurate description of the coarse scale quantities, e.g., the homogenized coefficient via local microscopic computations. Typical multiscale frameworks use local problems that suffer from the so-called resonance or cell-boundary error, dominating the all other errors in multiscale computations. Previously, the second order wave equation was used as a local problem to eliminate such an error. Although this approach eliminates the resonance error totally, the computational cost of the method is known to increase with increasing wave speed. In this paper, the possibility of integrating perfectly matched layers to the local wave equation is explored. In particular, questions in relation with accuracy and reduced computational costs are addressed. Numerical simulations are provided in a simplified one-dimensional setting to illustrate the ideas.

Place, publisher, year, edition, pages
Springer , 2022. p. 689-702
Keywords [en]
Homogenization, Wave equation, Errors, Numerical methods, Boundary errors, Cell boundary, Computational costs, Homogenization problems, Local problems, Multiscale computation, Multiscale framework, Perfectly Matched Layer, Upscaling, Wave equations
National Category
Computational Mathematics
Identifiers
URN: urn:nbn:se:mdh:diva-64450DOI: 10.1007/978-3-031-17820-7_30Scopus ID: 2-s2.0-85171555617ISBN: 9783031178207 (print)OAI: oai:DiVA.org:mdh-64450DiVA, id: diva2:1802629
Conference
Springer Proceedings in Mathematics and Statistics
Available from: 2023-10-05 Created: 2023-10-05 Last updated: 2025-10-10Bibliographically approved

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Arjmand, Doghonay

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