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arXiv 0903.4004math.APmath.AG
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完全可压缩Navier-斯托克斯方程入流问题波型的稳定性

Stability of Wave Patterns to the Inflow Problem of Full Compressible Navier-Stokes Equations

Xiaohong Qin, Yi Wang

摘要:

在射线$(0,+\infty)$上研究了完全可压缩Navier-斯托克斯方程的入流问题。首先,当右端态$(ρ_+,u_+,θ_+)$分别属于亚、跨、超音速区域时,给出了入流问题边界层解的存在性(或不存在性)。然后在一定的小尺度条件下,研究了单个接触波的渐近稳定性以及边界层解、接触波和稀疏波的叠加对入流问题的影响。注意,稀疏波的振幅可以任意大。用初等能量法给出了证明。

英文摘要:

The inflow problem of full compressible Navier-Stokes equations is considered on the half line $(0,+\infty)$. Firstly, we give the existence (or non-existence) of the boundary layer solution to the inflow problem when the right end state $(ρ_+,u_+,θ_+)$ belongs to the subsonic, transonic and supersonic regions respectively. Then the asymptotic stability of not only the single contact wave but also the superposition of the boundary layer solution, the contact wave and the rarefaction wave to the inflow problem are investigated under some smallness conditions. Note that the amplitude of the rarefaction wave can be arbitrarily large. The proofs are given by the elementary energy method.

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