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Simulations numériques directes du contrôle électromagnétique. Étude de l'impact d'un forçage électromagnétique

Abstract : Electromagnetic flow control (CEM) in seawater allows to apply local body forces directly to a flow in chosen regions. Actuators, made of wall-flush electrodes and permanent magnets, are an original mean of applying a force over the boundary layer. These electromagnetic body forces are local and their curl is a source of vorticity. They can be used in a network along the wall and activated periodically in time and space. Previous work, Rossi L. et al. (2002), experimentally showed the possibility of modifying coherent structures produced synthetically in a laminar boundary layer using electromagnetic forcing (EM). In the present study, a direct numerical simulation (DNS) based on Paulo Orlandi's code is undertaken, Orlandi P. (2000). This kind of simulation is an essential tool in identifying the active mechanisms for each of the control schemes studied. An ordinary turbulent boundary layer is computed and then the coherent structures in this boundary layer are identified. The next stage consists in imposing local electromagnetic forcing to this flow and in analyzing the response of the flow to this.
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https://tel.archives-ouvertes.fr/tel-00008776
Contributor : François Bouillon <>
Submitted on : Monday, March 14, 2005 - 6:57:57 PM
Last modification on : Thursday, November 19, 2020 - 3:54:10 PM
Long-term archiving on: : Friday, April 2, 2010 - 9:13:06 PM

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  • HAL Id : tel-00008776, version 1

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François Bouillon. Simulations numériques directes du contrôle électromagnétique. Étude de l'impact d'un forçage électromagnétique. Dynamique des Fluides [physics.flu-dyn]. Université Joseph-Fourier - Grenoble I, 2004. Français. ⟨tel-00008776⟩

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