An overset-grid finite-difference algorithm for seismic wavefield propagations modelling in the polar coordinate system with a complex free-surface topography Article Swipe
Hengkang Qiu
,
Yao‐Chong Sun
,
Changjiang Fang
,
Wei Zhang
,
Xiaofei Chen
·
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1093/gji/ggae312
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1093/gji/ggae312
SUMMARY Nowadays, finite-difference method has been widely applied to simulate seismic wavefield propagation in a local seismic model with a complex topography by utilizing curvilinear grids and traction image method in Cartesian coordinates system. For a global seismic model in polar coordinate system, it is still a challenge for the conventional finite-difference method to deal with the grid singularity at the centre and the topographic free surface at the top. In this study, we develop a finite-difference method in polar coordinates for seismic wavefield propagation in the 2-D global model. In the proposed finite-difference method, the overset-grid algorithm is used to handle the grid singularity at the centre, and the curvilinear grid technique as well as the traction image method are applied to implement free-surface boundary condition on the complex topography. The proposed finite-difference method is validated in flat and topographic free-surface models by comparing synthetic waveforms with reference solutions. The seismic wavefield propagation in a realistic Mars profile is computed by the proposed finite-difference method. The proposed finite-difference method is an efficient and accurate method for seismic wave modelling in the polar coordinate system with a complex free-surface topography.
Related Topics
Concepts
Curvilinear coordinates
Cartesian coordinate system
Coordinate system
Finite difference
Finite difference method
Polar coordinate system
Grid
Free surface
Regular grid
Singularity
Geology
Geometry
Algorithm
Seismic wave
Mathematical analysis
Geophysics
Geodesy
Computer science
Mathematics
Physics
Mechanics
Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1093/gji/ggae312
- OA Status
- gold
- Cited By
- 1
- References
- 44
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4402963574
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4402963574Canonical identifier for this work in OpenAlex
- DOI
-
https://doi.org/10.1093/gji/ggae312Digital Object Identifier
- Title
-
An overset-grid finite-difference algorithm for seismic wavefield propagations modelling in the polar coordinate system with a complex free-surface topographyWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
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2024Year of publication
- Publication date
-
2024-09-09Full publication date if available
- Authors
-
Hengkang Qiu, Yao‐Chong Sun, Changjiang Fang, Wei Zhang, Xiaofei ChenList of authors in order
- Landing page
-
https://doi.org/10.1093/gji/ggae312Publisher landing page
- Open access
-
YesWhether a free full text is available
- OA status
-
goldOpen access status per OpenAlex
- OA URL
-
https://doi.org/10.1093/gji/ggae312Direct OA link when available
- Concepts
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Curvilinear coordinates, Cartesian coordinate system, Coordinate system, Finite difference, Finite difference method, Polar coordinate system, Grid, Free surface, Regular grid, Singularity, Geology, Geometry, Algorithm, Seismic wave, Mathematical analysis, Geophysics, Geodesy, Computer science, Mathematics, Physics, MechanicsTop concepts (fields/topics) attached by OpenAlex
- Cited by
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1Total citation count in OpenAlex
- Citations by year (recent)
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2025: 1Per-year citation counts (last 5 years)
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44Number of works referenced by this work
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10Other works algorithmically related by OpenAlex
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