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Unstructured mesh based elastic wave modelling on GPU: a double-mesh grid method

文献类型：期刊论文

作者Yang, Kai; Zhang, Jianfeng; Gao, Hongwei
刊名GEOPHYSICAL JOURNAL INTERNATIONAL
出版日期2017-11-01
卷号211期号:2页码:763-772
关键词Numerical modelling Numerical solutions Computational seismology Wave propagation
ISSN号0956-540X
DOI10.1093/gji/ggx339
文献子类Article
英文摘要We present an unstructured mesh based numerical technique for modelling elastic wave propagation in heterogeneous media with complex geometrical settings. The scheme is developed by adapting the so-called grid method with a double-mesh implementation. The double-mesh is generated by subdividing each triangular grid of the first-level mesh into a group of congruent smaller grids with equally dividing each edge of the triangle. The resulting double-mesh grid method incorporates the advantages of structured- and unstructured-mesh schemes. The irregular, unstructured first-level mesh, which is generated by centroidal Voronoi tessellation based on Delaunay triangulation with a velocity-dependent density function, can accurately describe the surface topography and interfaces, and the size of the grid cells can vary according to local velocities. Congruent smaller grids within each grid cell of the first-level mesh greatly reduce the memory requirement of geometrical coefficients compared to a whole irregular, unstructured mesh. Applying the double-mesh approach can also alleviate the discontinuity of memory accessing mainly caused by adoption of fully unstructured mesh. As a result, the GPU implementation of the proposed scheme can obtain a high speedup rate. Numerical examples demonstrate the good behaviour of the double-mesh elastic grid method.
WOS关键词DISCONTINUOUS GALERKIN METHOD ; FINITE-DIFFERENCE METHOD ; SPECTRAL ELEMENT METHOD ; HETEROGENEOUS MEDIA ; EXPLICIT APPROACH ; FRACTURED MEDIA ; PROPAGATION ; VELOCITY
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000412281300005
出版者OXFORD UNIV PRESS
资助机构National Natural Science Fund of China(41574135 ; National Major Project of China(2017ZX05008-007) ; 41330316) ; National Natural Science Fund of China(41574135 ; National Major Project of China(2017ZX05008-007) ; 41330316) ; National Natural Science Fund of China(41574135 ; National Major Project of China(2017ZX05008-007) ; 41330316) ; National Natural Science Fund of China(41574135 ; National Major Project of China(2017ZX05008-007) ; 41330316)
源URL[http://ir.iggcas.ac.cn/handle/132A11/61991]  
专题地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者Zhang, Jianfeng
作者单位Chinese Acad Sci, Key Lab Petr Resources Res, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Yang, Kai,Zhang, Jianfeng,Gao, Hongwei. Unstructured mesh based elastic wave modelling on GPU: a double-mesh grid method[J]. GEOPHYSICAL JOURNAL INTERNATIONAL,2017,211(2):763-772.
APA Yang, Kai,Zhang, Jianfeng,&Gao, Hongwei.(2017).Unstructured mesh based elastic wave modelling on GPU: a double-mesh grid method.GEOPHYSICAL JOURNAL INTERNATIONAL,211(2),763-772.
MLA Yang, Kai,et al."Unstructured mesh based elastic wave modelling on GPU: a double-mesh grid method".GEOPHYSICAL JOURNAL INTERNATIONAL 211.2(2017):763-772.

入库方式： OAI收割

来源：地质与地球物理研究所

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