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arXiv 1709.09722math.AP
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关于可压缩二元混合流的强动力学

On strong dynamics of compressible two-component mixture flow

Tomasz Piasecki, Yoshihiro Shibata, Ewelina Zatorska

摘要:

我们研究了一个描述可压缩双组分混合物流动的系统。该系统由可压缩斯托克斯方程和描述分数质量演化的非对称反应扩散方程耦合而成。在$L_p-L_q$框架下,我们证明了局部强解的存在性,并在一定的小性假设下,证明了整体强解的存在性。我们的方法是基于所谓的熵变量,使重写系统的对称形式。然后,应用拉格朗日坐标,我们证明了局部存在的解决方案应用$L_p$ - $L_q$最大正则性估计。其次,应用指数衰减估计,我们证明了解决方案的存在性,在时间上的初始数据是足够接近一些常数。非线性估计施加限制$2<p<\infty, \ 3<q<\infty$。然而,出于一般性的目的,我们显示了$p$和$q$的更宽范围的线性估计。

英文摘要:

We investigate a system describing the flow of a compressible two-component mixture. The system is composed of the compressible Navier-Stokes equations coupled with non-symmetric reaction-diffusion equations describing the evolution of fractional masses. We show the local existence and, under certain smallness assumptions, also the global existence of unique strong solutions in $L_p-L_q$ framework. Our approach is based on so called entropic variables which enable to rewrite the system in a symmetric form. Then, applying Lagrangian coordinates, we show the local existence of solutions applying the $L_p$-$L_q$ maximal regularity estimate. Next, applying exponential decay estimate we show that the solution exists globally in time provided the initial data is sufficiently close to some constants. The nonlinear estimates impose restrictions $2<p<\infty, \ 3<q<\infty$. However, for the purpose of generality we show the linear estimates for wider range of $p$ and $q$.

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