New Fully Discrete Active Flux Methods with Truly Multi-Dimensional Evolution Operators and WENO Reconstruction
Numerical Analysis
2025-12-19 v1 Numerical Analysis
Abstract
We propose new fully discrete third-order accurate Active Flux and WENO methods based on truly multidimensional evolution operators for the two-dimensional acoustic equations. Building on the method of bicharacteristics, several approximate evolution operators are derived that yield an improved stability of the resulting schemes. A linear stability analysis is applied to determine the maximal CFL number. The schemes are tested extensively on both continuous and discontinuous problems, confirming their robustness and accurate approximation even on coarse grids.
Keywords
Cite
@article{arxiv.2512.16359,
title = {New Fully Discrete Active Flux Methods with Truly Multi-Dimensional Evolution Operators and WENO Reconstruction},
author = {Amelie Porfetye and Zhuyan Tang and Shaoshuai Chu and Christiane Helzel and Maria Lukacova-Medvidova},
journal= {arXiv preprint arXiv:2512.16359},
year = {2025}
}