We prove a priori estimates for the three-dimensional compressible Euler equations with moving physical vacuum boundary, with an equation of state given by p(ρ) = Cγργ for γ > 1. The vacuum condition necessitates the vanishing of the pressure, and hence density, on the dynamic boundary, which creates a degenerate and characteristic hyperbolic free-boundary system to which standard methods of symmetrizable hyperbolic equations cannot be applied.
机构:
Univ Jyvaskyla, Dept Math & Stat, POB 35 MaD, Jyvaskyla 40014, FinlandUniv Jyvaskyla, Dept Math & Stat, POB 35 MaD, Jyvaskyla 40014, Finland
Julin, Vesa
La Manna, Domenico Angelo
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机构:
Univ Napoli Federico II, Dipartimento Matemat & Applicaz, Via Cintia, I-80126 Naples, ItalyUniv Jyvaskyla, Dept Math & Stat, POB 35 MaD, Jyvaskyla 40014, Finland
机构:
Aix Marseille Univ, CNRS, Marseille, France
Inst Surete & Radioprotect Nucl IRSN, St Paul Les Durance, FranceAix Marseille Univ, CNRS, Marseille, France
机构:
Aix Marseille Univ, CNRS, Marseille, France
Inst Surete & Radioprotect Nucl IRSN, St Paul Les Durance, FranceAix Marseille Univ, CNRS, Marseille, France