On the stability of multi-dimensional rarefaction waves I: the energy estimates

Tian-Wen Luo; Pin Yu

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arXiv · 2302.09714

On the stability of multi-dimensional rarefaction waves I: the energy estimates

Tian-Wen Luo·Pin Yu

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Abstract

We study the resolution of discontinuous singularities in gas dynamics via rarefaction waves. The mechanism is well-understood in the one dimensional case. We will prove the non-nonlinear stability of the Riemann problem for multi-dimensional isentropic Euler equations in the regime of rarefaction waves. The proof relies on the new energy estimates \emph{without loss of derivatives}. We also give a detailed geometric description of the rarefaction wave fronts. This is the first paper in the series which provides the \emph{a priori} energy bounds.

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Tian-Wen Luo, Pin Yu. 2023-02-20. On the stability of multi-dimensional rarefaction waves I: the energy estimates. https://arxiv.org/abs/2302.09714

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