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arXiv 1102.4276gr-qc
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具有真空边界的2维时空中相对论性Euler方程解的存在性

On the existence of solutions to the relativistic Euler equations in 2 spacetime dimensions with a vacuum boundary

Todd A. Oliynyk

摘要:

本文证明了具有流体真空边界的状态方程为$p=Kρ^2$形式的二维时空等熵相对论欧拉方程的一类解的存在性。在流体真空边界附近,这些解的声速单调减小,在密度为零的地方接近零。此外,流体加速度是有限的,并且随着流体真空边界的接近而远离零。本文的存在性结果也以直接的方式推广到$p=Kρ^\frac{γ+1}γ$和$γ> 0$形式的状态方程。

英文摘要:

We prove the existence of a wide class of solutions to the isentropic relativistic Euler equations in 2 spacetime dimensions with an equation of state of the form $p=Kρ^2$ that have a fluid vacuum boundary. Near the fluid vacuum boundary, the sound speed for these solutions are monotonically decreasing, approaching zero where the density vanishes. Moreover, the fluid acceleration is finite and bounded away from zero as the fluid vacuum boundary is approached. The existence results of this article also generalize in a straightforward manner to equations of state of the form $p=Kρ^\frac{γ+1}γ$ with $γ> 0$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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