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arXiv 2604.06910math.NAcs.NA
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一种用于椭圆-双曲方程的不连续伽辽金方法

A discontinuous Galerkin method for elliptic-hyperbolic equations: the Tricomi problem

University of Pavia(帕维亚大学);University of Arizona(亚利桑那大学);University of Vienna(维也纳大学)

Chiara Perinati, Lise-Marie Imbert-Gérard, Andrea Moiola, Paul Stocker

AI总结:

本文提出并分析了一种不连续伽辽金方法,用于求解一类二阶线性混合型偏微分方程,通过能量范数的 coercivity 技术建立离散问题的 well-posedness,并推导了 hp-a priori 错误估计,通过数值实验验证了理论结果。

摘要:

我们提出并分析了一种不连续伽辽金方法,用于求解一类二阶线性混合型偏微分方程,即方程在计算域内从椭圆型变为双曲型。通过 Morawetz 乘子技术在能量范数中建立离散问题的 well-posedness。我们推导了 hp-a priori 错误估计,用于证明标准和准 Trefftz 多项式空间的收敛速率。数值实验验证了理论结果。

英文摘要:

We present and analyze a discontinuous Galerkin method for the numerical solution of a class of second-order linear mixed-type partial differential equations, i.e. equations that change their nature from elliptic to hyperbolic through the computational domain. Well-posedness of the discrete problem is established via coercivity in an energy norm, achieved through the Morawetz multiplier technique. We derive $hp$-a priori error estimates in the energy norm, which we use to prove convergence rates for standard and quasi-Trefftz polynomial spaces. Numerical experiments validate the theoretical results.

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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