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Analysis of stretched grids as buffer zones in simulations of wave propagation
Uppsala University, Department of Information Technology, Sweden.
Technical University of Munich, Institute for Computational Mechanics, Germany.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.
2016 (English)In: Applied Numerical Mathematics, ISSN 0168-9274, E-ISSN 1873-5460, Vol. 107, 1-17 p.Article in journal (Refereed) PublishedText
Abstract [en]

A zone of increasingly stretched grid is a robust and easy-to-use way to avoid unwanted reflections at artificial boundaries in wave propagating simulations. In such a buffer zone there are two main damping mechanisms, dissipation and under-resolution that turns a traveling wave into an evanescent wave. We present analysis in one and two space dimensions showing that evanescent decay through under-resolution is a very efficient way to damp waves. The analysis is supported by numerical computations.

Place, publisher, year, edition, pages
2016. Vol. 107, 1-17 p.
Keyword [en]
Non-reflecting boundary conditions, Buffer zones, Wave propagation
National Category
Mathematics
Identifiers
URN: urn:nbn:se:kth:diva-189783DOI: 10.1016/j.apnum.2016.04.008ISI: 000378447000001ScopusID: 2-s2.0-84966267444OAI: oai:DiVA.org:kth-189783DiVA: diva2:949570
Note

QC 20160721

Available from: 2016-07-21 Created: 2016-07-15 Last updated: 2016-08-31Bibliographically approved

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Efraimsson, Gunilla
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