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arXiv 0906.4797math.APmath-phmath.MP
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二维无粘旋转浅水系统的经典解

On the Classical Solutions of Two Dimensional Inviscid Rotating Shallow Water System

Bin Cheng, Chunjing Xie

摘要:

本文证明了在零相对涡度约束下具有小初值的二维无粘旋转浅水方程组的整体经典解的存在性和渐近性态。其中一个关键步骤是将问题转化为一个对称拟线性Klein-Gordon方程组,然后结合向量场方法和规范型证明了该方程组经典解的整体存在性.我们还探讨了一般的初始数据的情况下,揭示了一个下界的寿命几乎是成反比的初始相对涡的大小。

英文摘要:

We prove global existence and asymptotic behavior of classical solutions for two dimensional inviscid Rotating Shallow Water system with small initial data subject to the zero-relative-vorticity constraint. One of the key steps is a reformulation of the problem into a symmetric quasilinear Klein-Gordon system, for which the global existence of classical solutions is then proved with combination of the vector field approach and the normal forms. We also probe the case of general initial data and reveal a lower bound for the lifespan that is almost inversely proportional to the size of the initial relative vorticity.

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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