Superstep wavefield propagation

IF 2.1 3区物理与天体物理 Q2 ACOUSTICS

Wave Motion Pub Date : 2025-01-04 DOI:10.1016/j.wavemoti.2024.103489

Tamas Nemeth , Kurt Nihei , Alex Loddoch , Anusha Sekar , Ken Bube , John Washbourne , Luke Decker , Sam Kaplan , Chunling Wu , Andrey Shabelansky , Milad Bader , Ovidiu Cristea , Ziyi Yin

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引用次数: 0

Abstract

This paper describes how to propagate wavefields for arbitrary numbers of traditional time steps in a single step, called a superstep. We show how to construct operators that accomplish this task for finite-difference time domain schemes, including temporal first-order schemes in isotropic, anisotropic and elastic media, as well as temporal second-order schemes for acoustic media. This task is achieved by implementing a computational tradeoff differing from traditional single step wavefield propagators by precomputing propagator matrices for each model location for

k

timesteps (a superstep) and using these propagator matrices to advance the wavefield

k

time steps at once. This tradeoff separates the physics of the propagator matrix computation from the computer science of wavefield propagation and allows each discipline to provide their optimal modular solutions.

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超阶波场传播

本文描述了如何在一个称为超步长的单步中传播任意数量的传统时间步长的波场。我们展示了如何为有限差分时域格式构建完成此任务的算子，包括各向同性、各向异性和弹性介质中的时间一阶格式，以及声学介质的时间二阶格式。这项任务是通过实现与传统单步波场传播器不同的计算权衡来实现的，通过预先计算k个时间步（超步）的每个模型位置的传播器矩阵，并使用这些传播器矩阵一次推进波场k个时间步。这种权衡将传播矩阵计算的物理学与波场传播的计算机科学分开，并允许每个学科提供其最佳模块化解决方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Wave Motion 物理-力学

CiteScore

4.10

自引率

8.30%

发文量

118

审稿时长

3 months

期刊介绍： Wave Motion is devoted to the cross fertilization of ideas, and to stimulating interaction between workers in various research areas in which wave propagation phenomena play a dominant role. The description and analysis of wave propagation phenomena provides a unifying thread connecting diverse areas of engineering and the physical sciences such as acoustics, optics, geophysics, seismology, electromagnetic theory, solid and fluid mechanics. The journal publishes papers on analytical, numerical and experimental methods. Papers that address fundamentally new topics in wave phenomena or develop wave propagation methods for solving direct and inverse problems are of interest to the journal.