New Paper ‘Pseudo-Energy-Preserving Explicit Runge-Kutta Methods’ published in ESAIM: Mathematical Modelling and Numerical Analysis (ESAIM: M2AN)

The paper Pseudo-Energy-Preserving Explicit Runge-Kutta Methods of Gabriel A. Barrios de León, David I. Ketcheson, and me has been published in ESAIM: Mathematical Modelling and Numerical Analysis (ESAIM: M2AN).

Using a recent characterization of energy-preserving B-series, we derive the explicit conditions on the coefficients of a Runge–Kutta method that ensure energy preservation (for Hamiltonian systems) up to a given order in the step size, which we refer to as the pseudo-energy-preserving (PEP) order. We study explicit Runge–Kutta methods with PEP order higher than their classical order. We provide examples of such methods up to PEP order six, and test them on Hamiltonian ODE and PDE systems. We find that these methods behave similarly to exactly energy-conservative methods over moderate time intervals and exhibit significantly smaller errors, relative to other Runge–Kutta methods of the same order, for moderately long-time simulations.

The reproducibility repository is available on GitHub.

As usual, you can find the preprint on arXiv.