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High-order finite difference methods for eartquake rupture dynamics in complex geometries
Department of Information Technology, Uppsala University.
Department of Geophysics, Stanford University.
Department of Geophysics, Stanford University.
Linköpings universitet, Matematiska institutionen, Beräkningsvetenskap. Linköpings universitet, Tekniska högskolan.ORCID-id: 0000-0002-7972-6183
2010 (engelsk)Konferansepaper, Publicerat paper (Annet vitenskapelig)
Abstract [en]

Unstructured grid methods are well suited for earthquake problems in complex geometries, such as non-planar and branching faults. Unfortunately they are inefficient in comparisioin with high-order finite difference. With the use of summertion-by-parts (SBP) operators and the SAT penalty method (simultaneous approximation term) it is possible to couple unstructuren finite volume methods wiht high order finite difference methods in an accurate and stable way. The coupled methods is more efficient than the unstructured method alone. Another advantage of the SBP and SAT method is that it is possible to prove strict stability, meaning that the semi-discrete solution dissipates energy at a slightly faster rate than the continuous solution so that the error remains bounded in time, which is particulary useful for long time computations.

sted, utgiver, år, opplag, sider
2010. s. 1-1
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-67133OAI: oai:DiVA.org:liu-67133DiVA, id: diva2:407758
Konferanse
2010 AGU Fall Meeting, 13–17 December, San Francisco, California, USA
Merknad
PosterTilgjengelig fra: 2011-04-06 Laget: 2011-03-31 Sist oppdatert: 2013-08-30bibliografisk kontrollert

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