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arXiv 1303.0163math.AP
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粘性不可压缩流体中可变形固体模型三维强解的存在性

Existence of 3D strong solutions for a system modeling a deformable solid inside a viscous incompressible fluid

Sébastien Court

摘要:

在本文中,我们研究了一个耦合系统的运动模拟的可变形固体浸没在流体中。对于固体,我们考虑一个给定的变形,它必须服从几个物理约束。流体的运动由不可压缩斯托克斯方程在$\R^3$的时间相关的有界区域中模拟,并且固体满足牛顿定律。我们的贡献包括在适应和完成ARMA 2008年的一些结果在3维,在一个框架中,固体的变形规律是有限的。我们重写主系统的域不依赖于时间,通过使用一种新的手段,定义一个变量变换,和一个适当的变化的未知数。我们研究了相应的线性化系统之前,设置一个本地的时间存在性结果。小数据,特别是任意接近身份的固体变形的全球存在。

英文摘要:

In this paper we study a coupled system modeling the movement of a deformable solid immersed in a fluid. For the solid we consider a given deformation that has to obey several physical constraints. The motion of the fluid is modeled by the incompressible Navier-Stokes equations in a time-dependent bounded domain of $\R^3$, and the solid satisfies the Newton's laws. Our contribution consists in adapting and completing some results of ARMA 2008 in dimension 3, in a framework where the regularity of the deformation of the solid is limited. We rewrite the main system in domains which do not depend on time, by using a new means of defining a change of variables, and a suitable change of unknowns. We study the corresponding linearized system before setting a local-in-time existence result. Global existence is obtained for small data, and in particular for deformations of the solid which are arbitrarily close to the identity.

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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