Analysis of stretched grids as buffer zones in simulations of wave propagation
2016 (English)In: Applied Numerical Mathematics, ISSN 0168-9274, E-ISSN 1873-5460, Vol. 107, 1-17 p.Article in journal (Refereed) PublishedText
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.
Non-reflecting boundary conditions, Buffer zones, Wave propagation
IdentifiersURN: 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
QC 201607212016-07-212016-07-152016-08-31Bibliographically approved