The main purpose of this thesis is the developement of new numerical procedures for simulating three-dimensional turbulent flows and aeroelasticity problems. In order to solve such large size multi-physics problems a parallel code called PFES360 based on a functional decomposition is developed.;In the case of a turbulent flow the discretization of the governing equations on anisotropic tetrahedral grids requires the use of extremely deformed elements. The distortion of these elements dramatically affects the system conditioning. Therefore, standard methods become unable to stabilize the numerical solution. New definitions of the matrix tau and the shock capturing operator are then introduced.;These methods have been implemented in PFES360. The performance of the algorithms is demonstrated through numerical studies. Comparisons with analytical (flat plate) and experimental (Agard 445.6 and Onera M6) results are presented.;It has been demonstrated that the success of such simulations depends on the turbulence model, the stabilization method and essentially on the mesh quality. Also, it is important to ensure the positivity of the turbulent viscosity in order to avoid convergence problems.
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