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arXiv 1504.00830math.APphysics.class-ph
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一类梁-流体相互作用方程组整体强解的存在性

Existence of global strong solutions to a beam-fluid interaction system

C. Grandmont, M. Hillairet

摘要:

本文研究了非定常非线性流固耦合问题,这是一个描述动脉血流的简化模型。本文考虑一个由Navier-斯托克斯方程描述的牛顿不可压缩二维流动,该流动在一个未知区域中,取决于结构的位移,该结构本身满足一个线性粘弹性梁方程。流体和结构通过交界条件完全耦合,该界面条件规定了流体-结构界面处的速度的连续性和作用-反作用原理。我们证明了这个问题的强解是时间上全局的。我们得到特别是粘弹壁和流体腔的底部之间的接触不会发生在有限的时间。据我们所知,这是第一次出现的无接触的结果,但也存在的强解全球的时间,在粘性流体和可变形结构之间的相互作用的框架。

英文摘要:

We study an unsteady non linear fluid-structure interaction problem which is a simplified model to describe blood flow through viscoleastic arteries. We consider a Newtonian incompressible two-dimensional flow described by the Navier-Stokes equations set in an unknown domain depending on the displacement of a structure, which itself satisfies a linear viscoelastic beam equation. The fluid and the structure are fully coupled via interface conditions prescribing the continuity of the velocities at the fluid-structure interface and the action-reaction principle. We prove that strong solutions to this problem are global-in-time. We obtain in particular that contact between the viscoleastic wall and the bottom of the fluid cavity does not occur in finite time. To our knowledge, this is the first occurrence of a no-contact result, but also of existence of strong solutions globally in time, in the frame of interactions between a viscous fluid and a deformable structure.

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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