Energy-superconvergent Runge-Kutta Time Discretizations
Abstract
In this paper, we investigate the energy accuracy of explicit Runge-Kutta (RK) time discretization for antisymmetric autonomous linear systems and present a framework for constructing RK methods with an order of energy accuracy much greater than the number of stages. For an $s$-stage, $p$th-order RK method, we show that the energy accuracy can achieve superconvergence with an order up to $2s-p+1$ if $p$ is even. Several energy-superconvergent methods, including five- to seven-stage fourth-order methods with energy accuracy up to the eleventh order, together with their strong stability criteria, are derived. The proposed methods are examined using several applications, including second-order ordinary differential equations for harmonic oscillators, linear integro-differential equations for peridynamics, and one-dimensional Maxwell's equations of electrodynamics.
- Publication:
-
arXiv e-prints
- Pub Date:
- May 2024
- DOI:
- 10.48550/arXiv.2405.05448
- arXiv:
- arXiv:2405.05448
- Bibcode:
- 2024arXiv240505448L
- Keywords:
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- Mathematics - Numerical Analysis;
- 65L06;
- 65M12;
- 35Q61;
- 74A70