Euler equations with spherical symmetry and an outing absorbing boundary

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Original languageEnglish
Pages (from-to)1-23
Journal / PublicationCommunications in Partial Differential Equations
Volume24
Issue number1-2
Publication statusPublished - 1999

Abstract

In this paper, we consider the Euler equations with spherical symmetry in ℝ3 outside a region of the center. By assuming an outing absorbing boundary and within the leading term with respect to the amplitude of wave strength, we prove that there exists a uniform bound for the approximate solutions constructed by Glimm's scheme. This implies that the main difficulty left for the full nonlinear system when x ≥ 1 is to estimate the infinite reflections of waves inside the region {(x, t)|1 ≤ x ≤ 1 + λ*t, t ≥ 0}, where λ* is the supremum of the absolute value of the characteristics under consideration.