Stability of structure-aware Taylor methods for tents

Stability of structure-aware Taylor methods for tents
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帐篷结构感知泰勒方法的稳定性

DOI:
10.1090/mcom/3811
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发表时间:
2023
影响因子:
2
通讯作者:
Sun, Zheng
Sun, Zheng
中科院分区:
数学2区
文献类型:
--
作者:
Gopalakrishnan, Jay;Sun, Zheng

文献摘要

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相似文献

结构感知泰勒 (SAT) 方法是一类时间步进方案,设计用于在帐篷形时空区域内传播线性双曲解。帐篷可用于在非结构化推进前沿设计明确的时间推进方案,并具有用于任意空间和时间离散化顺序的内置局部变量时间步长。本文的主要结果是帐篷内的阶段 SAT 时间步长在时间步长约束下是弱稳定的,其中 是时间步长, 是空间网格大小。还提出了与低阶空间多项式相结合的高阶 SAT 时间离散化的改进稳定性特性。还包括对已证实的估计的清晰度的数值验证。参考
Structure-aware Taylor (SAT) methods are a class of timestepping schemes designed for propagating linear hyperbolic solutions within a tent-shaped spacetime region. Tents are useful to design explicit time marching schemes on unstructured advancing fronts with built-in locally variable timestepping for arbitrary spatial and temporal discretization orders. The main result of this paper is that an-stage SAT timestepping within a tent is weakly stable under the time step constraint, whereis the time step size andis the spatial mesh size. Improved stability properties are also presented for high-order SAT time discretizations coupled with low-order spatial polynomials. A numerical verification of the sharpness of proven estimates is also included. References
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影响因子: 1.6
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