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

Glass, Olivier; Kolumbán, József; Sueur, Franck (2021), Remote trajectory tracking of rigid bodies immersed in a 2D perfect incompressible fluid, Pure and Applied Analysis, 3, 4, p. 613-652. 10.2140/paa.2021.3.613

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Type
Article accepté pour publication ou publié
Date
2021
Journal name
Pure and Applied Analysis
Volume
3
Number
4
Publisher
Mathematical Sciences Publishers
Pages
613-652
Publication identifier
10.2140/paa.2021.3.613
Metadata
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Author(s)
Glass, Olivier
CEntre de REcherches en MAthématiques de la DEcision [CEREMADE]
Kolumbán, József
Universität Leipzig [Leipzig]
Sueur, Franck
Institut de Mathématiques de Bordeaux [IMB]
Abstract (EN)
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., Kolumbán, 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.
Subjects / Keywords
control problem; coupled ODE-PDE system; Euler equation; fluid mechanics; fluid-solid interaction; trajectory tracking

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