arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.05235math.AP
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二维理想不可压缩流体中刚体的远程轨迹跟踪

Remote trajectory tracking of rigid bodies immersed in a 2D perfect incompressible fluid

Olivier Glass, József Kolumbán, Franck Sueur

摘要:

本文研究了二维不可压缩理想流体中多个刚体的运动。刚体的运动由牛顿定律给出,力由流体压力引起,流体运动由不可压缩的欧拉方程描述。我们的分析涵盖的情况下,周围的机构的流体速度的环流是非零的流体涡量有界的。整个系统占据了一个有界的简单连接的域与外部固定的边界是不可渗透的,除了在一个开放的非空的部分,其中一个允许一些流体进出的域通过控制法向速度和进入涡量。我们证明,它是可能的,以精确地实现任何非碰撞的光滑运动的刚体的远程作用的控制法向速度的外边界上的状态反馈的形式,与零进入涡。这扩展了(Glass,O.,Kolumb{á}n,J. J.,Sueur,F.(2017年)。理想二维流体中刚体运动的外部边界控制。分析\& PDE),研究了浸入二维无旋理想不可压缩流体中的单刚体从初始位置和速度到最终位置和速度的精确可控性.证明依赖于一个非线性的方法来解决线性扰动的非线性方程与二次算子有一个经常的非平凡的零。本文将这种方法应用于一类边界控制所满足的二次方程,这类控制是通过扩展(Glass,O.,拉卡夫角Munnier,A.,Sueur,F.(2019年)。二维不可压缩理想流体中刚体的动力学。Journal of微分方程,267(6),3561-3577)到控制作用于外部边界的情况。

英文摘要:

We consider the motion of several rigid bodies immersed in a two-dimensional incompressible perfect fluid. The motion of the rigid bodies is given by the Newton laws with forces due to the fluid pressure and the fluid motion is described by the incompressible Euler equations. Our analysis covers the case where the circulations of the fluid velocity around the bodies are nonzero and where the fluid vorticity is bounded. The whole system occupies a bounded simply connected domain with an external fixed boundary which is impermeable except on an open non-empty part where one allows some fluid to go in and out the domain by controlling the normal velocity and the entering vorticity. We prove that it is possible to exactly achieve any non-colliding smooth motion of the rigid bodies by the remote action of a controlled normal velocity on the outer boundary which takes the form of state-feedback, with zero entering vorticity. This extends the result of (Glass, O., Kolumb{á}n, J. J., Sueur, F. (2017). External boundary control of the motion of a rigid body immersed in a perfect two-dimensional fluid. Analysis \& PDE) where the exact controllability of a single rigid body immersed in a 2D irrotational perfect incompressible fluid from an initial position and velocity to a final position and velocity was investigated. The proof relies on a nonlinear method to solve linear perturbations of nonlinear equations associated with a quadratic operator having a regular non-trivial zero. Here this method is applied to a quadratic equation satisfied by a class of boundary controls, which is obtained by extending the reformulation of the Newton equations performed in the uncontrolled case in (Glass, O., Lacave, C., Munnier, A., Sueur, F. (2019). Dynamics of rigid bodies in a two dimensional incompressible perfect fluid. Journal of Differential Equations, 267(6), 3561-3577) to the case where a control acts on the external boundary.

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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