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arXiv 1402.5779math.AP
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三阶流体方程的渐近解

Asymptotic profiles for the third grade fluids equations

Olivier Coulaud

摘要:

研究了二维三阶流体方程解的长时间行为。在加权索伯列夫空间中引入标度变量和进行几个能量估计,我们描述了这些解的一阶渐近展开。它特别表明,在小的假设下的数据,第三级流体方程的解决方案收敛到热方程的自相似的解决方案,这可以显式地计算从数据。

英文摘要:

We study the long time behaviour of the solutions of the third grade fluids equations in dimension 2. Introducing scaled variables and performing several energy estimates in weighted Sobolev spaces, we describe the first order of an asymptotic expansion of these solutions. It shows in particular that, under smallness assumptions on the data, the solutions of the third grade fluids equations converge to self-similar solutions of the heat equations, which can be computed explicitly from the data.

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