Well-posedness of the Euler system of gas dynamics
Abstract
We propose a new two-step selection criterion applicable to the dissipative measure--valued solutions of the Euler system of gas dynamics. The process consists of a successive maximisation of the entropy production rate and the total energy defect, i.e. maximisation of the turbulent energy. If the selected solution is a weak solution of the Euler system, then it is identified in the first step. Solutions selected in the second step are truly measure--valued maximising the energy defect. Accordingly, they are called turbulent solutions. The energy defect of turbulent solutions vanishes with growing time. The selected solutions depend in a Borel--measurable way on the initial data. In particular, they are almost continuously dependent on the initial data.
Keywords
Cite
@article{arxiv.2512.18267,
title = {Well-posedness of the Euler system of gas dynamics},
author = {Eduard Feireisl and Maria Lukacova-Medvidova},
journal= {arXiv preprint arXiv:2512.18267},
year = {2025}
}