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arXiv 1808.07565math.NAcs.NA
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基于能量的不连续伽辽金方法用于二阶形式的耦合弹声波方程

An Energy Based Discontinuous Galerkin Method for Coupled Elasto-Acoustic Wave Equations in Second Order Form

Chalmers University of Technology(查尔姆斯理工大学);University of Gothenburg(哥德堡大学)

Daniel Appelö, Siyang Wang

AI总结:

本文提出了一种基于能量的不连续伽辽金方法,用于求解耦合流固弹性波方程,该方法在界面处引入合适的界面条件,并通过数值实验验证了方法的准确性和鲁棒性。

摘要:

我们考虑了在静态但可能弯曲界面分隔的耦合流固区域中的波传播问题。波传播通过流体中的速度势声波方程和固体中的弹性波方程来建模。在流固界面处,我们施加合适的界面条件以耦合这两个方程。我们使用最近开发的能量基不连续伽辽金方法对主导方程进行空间离散化。两者都推导出能量守恒和迎风数值通量以施加界面条件。所开发方案的主要特点包括可证明的能量稳定性以及高阶精度。我们通过数值实验来说明所开发方案的精度特性及鲁棒性。

英文摘要:

We consider wave propagation in a coupled fluid-solid region, separated by a static but possibly curved interface. The wave propagation is modeled by the acoustic wave equation in terms of a velocity potential in the fluid, and the elastic wave equation for the displacement in the solid. At the fluid solid interface, we impose suitable interface conditions to couple the two equations. We use a recently developed, energy based discontinuous Galerkin method to discretize the governing equations in space. Both energy conserving and upwind numerical fluxes are derived to impose the interface conditions. The highlights of the developed scheme include provable energy stability and high order accuracy. We present numerical experiments to illustrate the accuracy property and robustness of the developed scheme.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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