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dc.contributor.authorLu, Yong Ming
dc.contributor.authorLiu, Qiancheng
dc.date.accessioned2017-12-21T13:57:04Z
dc.date.available2017-12-21T13:57:04Z
dc.date.issued2018-03-05
dc.identifier.citationLu YM, Liu Q (2017) Non-overlapped P- and S-wave Poynting vectors and its solution on Grid Method. Journal of Geophysics and Engineering. Available: http://dx.doi.org/10.1088/1742-2140/aaa0f1.
dc.identifier.issn1742-2132
dc.identifier.issn1742-2140
dc.identifier.doi10.1088/1742-2140/aaa0f1
dc.identifier.urihttp://hdl.handle.net/10754/626419
dc.description.abstractPoynting vector represents the local directional energy flux density of seismic waves in geophysics. It is widely used in elastic reverse time migration (RTM) to analyze source illumination, suppress low-wavenumber noise, correct for image polarity and extract angle-domain common imaging gather (ADCIG). However, the P and S waves are mixed together during wavefield propagation such that the P and S energy fluxes are not clean everywhere, especially at the overlapped points. In this paper, we use a modified elastic wave equation in which the P and S vector wavefields are naturally separated. Then, we develop an efficient method to evaluate the separable P and S poynting vectors, respectively, based on the view that the group velocity and phase velocity have the same direction in isotropic elastic media. We furthermore formulate our method using an unstructured mesh based modeling method named the grid method. Finally, we verify our method using two numerical examples.
dc.description.sponsorshipWe thank the National Natural Science Fund of China (under grant 41330316) for supporting this work.
dc.publisherOxford University Press (OUP)
dc.relation.urlhttp://iopscience.iop.org/article/10.1088/1742-2140/aaa0f1
dc.rightsThis is an author-created, un-copyedited version of an article accepted for publication/published in Journal of Geophysics and Engineering. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://doi.org/10.1088/1742-2140/aaa0f1
dc.subjectseparable
dc.subjectpoynting vector
dc.subjectunmixed
dc.subjectunstructured mesh
dc.titleNon-overlapped P- and S-wave Poynting vectors and its solution on Grid Method
dc.typeArticle
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalJournal of Geophysics and Engineering
dc.eprint.versionPost-print
dc.contributor.institutionUniversity of Chinese Academy of Sciences, Beijing, 100049, China.
dc.contributor.institutionUniversity College London, London, WC1E 6BT, United Kingdom.
kaust.personLiu, Qiancheng
refterms.dateFOA2018-12-12T00:00:00Z
dc.date.published-online2018-03-05
dc.date.published-print2018-06-01


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