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Contribution à l'étude expérimentale des écoulements confinés à surfaces libres : application à l'interaction fluide-structure dans un compartiment de JIG artisanal

Abstract : The work realized under this co-supervised thesis concerns two study areas of fluid-structure interaction. The first concerned the Mineral Engineering and deals with the interaction between a moving grate in a sluice and the confined flow associated. The second concerns the fundamental Hydrodynamics and deals with the interaction of a cylinder mounted on flexible supports and a free surface flow in presence of plane wall. Our work contributes to the study a confined free surface flow by experimental approach. We coupled techniques of CCD camera visualization, velocity fields measurements by PIV and hydrodynamic forces to qualify the dynamics of structure motion in the flow. Experimental methods and devices are applied to the study the flow around two simplified models of a moving JIG grate and then to study a vibrating cylinder due to flow. Treatments of PIV data acquisitions by multivariable statistical POD enabled us to describe evolution of recirculation zones in the compartment and unsteady velocity field. Experimental study was completed by a numerical simulation of Jig model by using ANSYS14.5 and a numerical wake oscillator model for the case of the cylinder. This work highlighted a simple technique to give motion, in a sluice, a attached net to a cylinder and to study effects of free surface flow confinement on a vibrating cylinder
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https://tel.archives-ouvertes.fr/tel-01668479
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Submitted on : Wednesday, December 20, 2017 - 9:47:19 AM
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  • HAL Id : tel-01668479, version 1

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Cyriaque Donat Randrianantenaina. Contribution à l'étude expérimentale des écoulements confinés à surfaces libres : application à l'interaction fluide-structure dans un compartiment de JIG artisanal. Mécanique des fluides [physics.class-ph]. Université du Havre, 2016. Français. ⟨NNT : 2016LEHA0033⟩. ⟨tel-01668479⟩

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