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arXiv 1707.05093math.AP
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理想二维流体中刚体运动的外部边界控制

External boundary control of the motion of a rigid body immersed in a perfect two-dimensional fluid

Olivier Glass, József Kolumbán, Franck Sueur

摘要:

我们考虑一个刚体的运动,由于被包围的二维无旋完美不可压缩流体的压力,整个系统被限制在一个有界域的一部分的外部边界上的不可渗透的条件。由于脉冲控制策略,我们证明了存在一个适当的边界条件上的剩余部分的外部边界(允许一些流体进出的域),使浸没的刚体被驱动从一些给定的初始位置和速度到一些最终的位置和速度在一个给定的正时间,而不接触外部边界。外部边界的受控部分被假定为具有非空内部,并且最终位置被假定为在与初始位置相同的可能位置集合的连通分量中。

英文摘要:

We consider the motion of a rigid body due to the pressure of a surrounded two-dimensional irrotational perfect incompressible fluid, the whole system being confined in a bounded domain with an impermeable condition on a part of the external boundary. Thanks to an impulsive control strategy we prove that there exists an appropriate boundary condition on the remaining part of the external boundary (allowing some fluid going in and out the domain) such that the immersed rigid body is driven from some given initial position and velocity to some final position and velocity in a given positive time, without touching the external boundary. The controlled part of the external boundary is assumed to have a nonvoid interior and the final position is assumed to be in the same connected component of the set of possible positions as the initial position.

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