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arXiv 1407.7347math.AP
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二维完全可压缩Chaubergin气体Euler方程组的整体光滑对称解

The global smooth symmetric solution to 2-D full compressible Euler system of Chaplygin gases

Ding Bingbing, Witt Ingo, Yin Huicheng

摘要:

对于一维或多维多变气体的可压缩欧拉方程组,光滑解一般在有限时间内产生奇点。然而,对于三维Chaubergin气体,由于“零条件”在由无旋等熵流导出的势方程中的关键作用,P.Godin在[9]中证明了当初始数据是具有对常值紧支集的光滑小扰动时,具有变熵的光滑三维球对称流的整体存在性。指出二维双曲型方程组与三维双曲型方程组在整体解或爆破问题上存在着本质的区别。本文主要研究二维完全可压缩Chaubergin气体Euler方程组的整体对称解问题。通过深入分析,找到适当的权,得到了二维可压缩Chaubergin气体Euler方程组小对称解的一致加权能量估计,并利用连续归纳法进一步证明了光滑解的整体存在性.

英文摘要:

For one dimensional or multidimensional compressible Euler system of polytropic gases, it is well known that the smooth solution will generally develop singularities in finite time. However, for three dimensional Chaplygin gases, due to the crucial role of "null condition" in the potential equation which is derived by the irrotational and isentropic flow, P.Godin in [9] has proved the global existence of a smooth 3-D spherically symmetric flow with variable entropy when the initial data are of small smooth perturbations with compact supports to a constant state. It is noted that there are some essential differences on the global solution or blowup problems between 2-D and 3-D hyperbolic systems. In this paper, we will focus on the global symmetric solution problem of 2-D full compressible Euler system of Chaplygin gases. Through carrying out involved analysis and finding an appropriate weight we can derive some uniform weighted energy estimates on the small symmetric solution to 2-D compressible Euler system of Chaplygin gases and further establish the global existence of smooth solution by continuous induction method.

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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