粘声波方程的四边形和三角形间断Galerkin方法的色散-耗散分析

IF 2.1 3区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY
Rubing Han , Jiandong Huang , Xijun He
{"title":"粘声波方程的四边形和三角形间断Galerkin方法的色散-耗散分析","authors":"Rubing Han ,&nbsp;Jiandong Huang ,&nbsp;Xijun He","doi":"10.1016/j.jappgeo.2025.105931","DOIUrl":null,"url":null,"abstract":"<div><div>The discontinuous Galerkin method (DGM) has been extensively applied to numerically discretize acoustic and elastic wave equations. However, few studies are focused on viscous media. In this study, we conduct a comprehensive numerical dispersion-dissipation analysis of DGM for the visco-acoustic wave equation and simulate wave propagation in viscous media. The plane-wave analysis is based on the standard-linear-solid (SLS) -based model. A weighted Runge- Kutta (WRK) time scheme, Legendre polynomials, and a local Lax-Friedrichs flux are employed. The fully discrete analyses are implemented in quadrilateral and triangular elements. We consider two types of triangular elements, the quality factors and the number of mechanisms. Our results show that the quality factor leads to the numerical dispersion, the value of which is constant within a range of small sampling rate, but does not cause numerical dissipation. The visco-acoustic wave equation for different mechanisms for viscosity also introduces an inherent numerical-dispersion value that is not affected by the sampling rate. Meanwhile, we find that the stability of the quadrilateral mesh is stronger than that of the triangular mesh under the same order of basis functions. Several numerical experiments are provided to validate some theoretical findings. Seismic waves go through attenuation and phase distortion during propagation, and the numerical results indicate that the DGM is suitable for simulating seismic wave propagation in the SLS-based model.</div></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"243 ","pages":"Article 105931"},"PeriodicalIF":2.1000,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Dispersion-dissipation analysis of quadrilateral- and triangular-based discontinuous Galerkin methods for the visco-acoustic wave equation\",\"authors\":\"Rubing Han ,&nbsp;Jiandong Huang ,&nbsp;Xijun He\",\"doi\":\"10.1016/j.jappgeo.2025.105931\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The discontinuous Galerkin method (DGM) has been extensively applied to numerically discretize acoustic and elastic wave equations. However, few studies are focused on viscous media. In this study, we conduct a comprehensive numerical dispersion-dissipation analysis of DGM for the visco-acoustic wave equation and simulate wave propagation in viscous media. The plane-wave analysis is based on the standard-linear-solid (SLS) -based model. A weighted Runge- Kutta (WRK) time scheme, Legendre polynomials, and a local Lax-Friedrichs flux are employed. The fully discrete analyses are implemented in quadrilateral and triangular elements. We consider two types of triangular elements, the quality factors and the number of mechanisms. Our results show that the quality factor leads to the numerical dispersion, the value of which is constant within a range of small sampling rate, but does not cause numerical dissipation. The visco-acoustic wave equation for different mechanisms for viscosity also introduces an inherent numerical-dispersion value that is not affected by the sampling rate. Meanwhile, we find that the stability of the quadrilateral mesh is stronger than that of the triangular mesh under the same order of basis functions. Several numerical experiments are provided to validate some theoretical findings. Seismic waves go through attenuation and phase distortion during propagation, and the numerical results indicate that the DGM is suitable for simulating seismic wave propagation in the SLS-based model.</div></div>\",\"PeriodicalId\":54882,\"journal\":{\"name\":\"Journal of Applied Geophysics\",\"volume\":\"243 \",\"pages\":\"Article 105931\"},\"PeriodicalIF\":2.1000,\"publicationDate\":\"2025-09-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Applied Geophysics\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S092698512500312X\",\"RegionNum\":3,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"GEOSCIENCES, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Applied Geophysics","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S092698512500312X","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

摘要

不连续伽辽金方法(DGM)已广泛应用于声学和弹性波动方程的数值离散。然而,针对粘性介质的研究却很少。在本研究中,我们对粘声波动方程的DGM进行了全面的数值色散-耗散分析,并模拟了波在粘性介质中的传播。平面波分析是基于标准线性固体(SLS)模型的。采用加权Runge- Kutta (WRK)时间格式、Legendre多项式和局部Lax-Friedrichs通量。在四边形和三角形单元中实现了完全离散分析。我们考虑两种类型的三角元,质量因子和机构的数量。结果表明,质量因子会导致数值色散,其值在小采样率范围内是恒定的,但不会引起数值耗散。不同粘度机制的粘声波方程还引入了一个不受采样率影响的固有数值色散值。同时,我们发现在相同的基函数阶数下,四边形网格的稳定性要强于三角形网格。数值实验验证了一些理论结论。地震波在传播过程中会经历衰减和相位畸变,数值结果表明,DGM适用于基于sls模型的地震波传播模拟。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dispersion-dissipation analysis of quadrilateral- and triangular-based discontinuous Galerkin methods for the visco-acoustic wave equation
The discontinuous Galerkin method (DGM) has been extensively applied to numerically discretize acoustic and elastic wave equations. However, few studies are focused on viscous media. In this study, we conduct a comprehensive numerical dispersion-dissipation analysis of DGM for the visco-acoustic wave equation and simulate wave propagation in viscous media. The plane-wave analysis is based on the standard-linear-solid (SLS) -based model. A weighted Runge- Kutta (WRK) time scheme, Legendre polynomials, and a local Lax-Friedrichs flux are employed. The fully discrete analyses are implemented in quadrilateral and triangular elements. We consider two types of triangular elements, the quality factors and the number of mechanisms. Our results show that the quality factor leads to the numerical dispersion, the value of which is constant within a range of small sampling rate, but does not cause numerical dissipation. The visco-acoustic wave equation for different mechanisms for viscosity also introduces an inherent numerical-dispersion value that is not affected by the sampling rate. Meanwhile, we find that the stability of the quadrilateral mesh is stronger than that of the triangular mesh under the same order of basis functions. Several numerical experiments are provided to validate some theoretical findings. Seismic waves go through attenuation and phase distortion during propagation, and the numerical results indicate that the DGM is suitable for simulating seismic wave propagation in the SLS-based model.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Journal of Applied Geophysics
Journal of Applied Geophysics 地学-地球科学综合
CiteScore
3.60
自引率
10.00%
发文量
274
审稿时长
4 months
期刊介绍: The Journal of Applied Geophysics with its key objective of responding to pertinent and timely needs, places particular emphasis on methodological developments and innovative applications of geophysical techniques for addressing environmental, engineering, and hydrological problems. Related topical research in exploration geophysics and in soil and rock physics is also covered by the Journal of Applied Geophysics.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信