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Theses

Développement de méthodes de pénalisation pour la simulation de l’écoulement turbulent autour d’obstacles

Abstract : In the perspective of application to wind turbine design, this thesis aims to extend theuse of fictitious domain methods and in particular the method of penalization for the simulation of unsteady turbulent flows around obstacles of complex geometry. The unsteady turbulence modeling at high Reynolds numbers was studied by hybrid approaches(RANS / LES) such as (DES) and (DDES). In order to improve the prediction, a wall model based on simplified Thin Boundary Layer Equations (TBLE) was introduced.After a brief presentation of the tools and methods implemented, full 2D / 3D computations on cylinder and channel configuration are then presented, analyzed and compared to numerical and experimental results.The simulation results show the feasibility and effectiveness of the proposed models and the coupling method (DDES / TBLE).The latest investigation focuses on the simulation of the flow around the airfoil of a wind turbine. The success and fails of the computations are highlighted and explained.
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https://tel.archives-ouvertes.fr/tel-01578424
Contributor : Abes Star :  Contact
Submitted on : Tuesday, August 29, 2017 - 11:05:04 AM
Last modification on : Wednesday, November 3, 2021 - 8:56:41 AM

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BIZID_WIDED_2017.pdf
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  • HAL Id : tel-01578424, version 1

Citation

Wided Bizid. Développement de méthodes de pénalisation pour la simulation de l’écoulement turbulent autour d’obstacles. Mécanique [physics]. Université de Bordeaux, 2017. Français. ⟨NNT : 2017BORD0631⟩. ⟨tel-01578424⟩

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