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arXiv 1502.04602math.AP
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具有非线性退化粘性的标量守恒律Cauchy问题解的衰减性质

Decay properties of solutions to the Cauchy problem for the scalar conservation law with nonlinearly degenerate viscosity

Natsumi Yoshida

摘要:

本文研究了一维粘性守恒律方程柯西问题解的时间衰减率,其中远场态是给定的。特别地,我们处理的情况下,这是凸的通量函数和粘性是一个非线性退化(p-Laplacian型粘度)。由于相应的黎曼问题允许黎曼解为常数或单一稀疏波,Matsumura-Nishihara已经证明了柯西问题的解随着时间的推移趋向于常数或单一稀疏波。我们研究了相应解随时间的衰减速率。此外,我们还研究了高阶导数解随时间的衰减率。这是关于非线性粘性标量守恒律Cauchy问题解的渐近衰减的第一个结果。利用L1、L2-能量和时间加权Lq-能量方法给出了证明。

英文摘要:

In this paper, we study the decay rate in time to solutions of the Cauchy problem for the one-dimensional viscous conservation law where the far field states are prescribed. Especially, we deal with the case that the flux function which is convex and also the viscosity is a nonlinearly degenerate one (p-Laplacian type viscosity). As the corresponding Riemann problem admits a Riemann solution as the constant state or the single rarefaction wave, it has already been proved by Matsumura-Nishihara that the solution to the Cauchy problem tends toward the constant state or the single rarefaction wave as the time goes to infinity. We investigate that the decay rate in time of the corresponding solutions. Furthermore, we also investigate that the decay rate in time of the solution for the higher order derivative. These are the first result concerning the asymptotic decay of the solutions to the Cauchy problem of the scalar conservation law with nonlinear viscosity. The proof is given by L1, L2-energy and time-weighted Lq-energy methods.

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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