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arXiv 2303.13625math.APmath-phmath.MP
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动压边界条件下不可压缩流体与线性Koiter型壳相互作用的时间周期弱解

Time-periodic weak solutions for the interaction of an incompressible fluid with a linear Koiter type shell under dynamic pressure boundary conditions

Claudiu Mîndrilă, Sebastian Schwarzacher

AI总结:

该研究针对流固耦合中的时间周期运动问题,考虑动压边界条件下三维Navier-Stokes流体与边界二维线性Koiter壳的相互作用,通过新逼近技术和先验估计,证明了小周期外力下至少存在一个时间周期弱解。

摘要:

在诸多流固耦合场景中都能观测到时间周期运动。我们研究由三维Navier-Stokes方程描述的流体,与位于边界处的二维线弹性Koiter壳(科伊特壳)之间的相互作用。流体域是解的一部分,因此会随时间周期性变化。在边界的定常部分,我们考虑了具有物理相关性的动压边界值情形,该情形常用于建模流入/流出过程。针对幅值不太大的给定周期外力,我们证明了至少存在一个时间周期弱解。为此,我们引入了新的逼近技术和先验估计方法。

英文摘要:

In many occurrences of fluid-structure interaction time-periodic motions are observed. We consider the interaction between a fluid driven by the three dimensional Navier-Stokes equation and a two dimensional linearized elastic Koiter shell situated at the boundary. The fluid-domain is a part of the solution and as such changing in time periodically. On a steady part of the boundary we allow for the physically relevant case of dynamic pressure boundary values, prominent to model inflow/outflow. We provide the existence of at least one weak time-periodic solution for given periodic external forces that are not too large. For that we introduce new approximation techniques and a-priori estimates.

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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