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Quantifying the impact of different turbulence generation methods in high order simulations

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Required Education : Master 2
Start date : 1 February 2024
Mission duration : 6 mois
Deadline for applications : 15 December 2023


·       Méthodes d’ordre élevé

·       Différences spectrales

·       Turbulence



Current technological developments based on low environmental impact (emissions, noise) of aeronautical systems take advantages on unsteady numerical simulations. These have benefited from the rapid growth of calculation resources to establish themselves as an essential tool for the design of certain components. In this context, CERFACS is developing high order methods (spectral differences), allowing a better accuracy than standard methods for a given computational cost. However, damping numerical perturbations originating from turbulence generation techniques constitutes a major research area for these new methods.



The aim of this internship is to assess several turbulence generation methods (Kraichnan’s method, digital filter, …) in the context of high order simulations (JAGUAR code). The first mission to be carried out is the analysis of pressure disturbances associates with the turbulence initially introduced in the domain. Initial amplitude, propagation and damping of the perturbations is to be quantified. The second work aims to study the influence of the turbulent generation process on the turbulent statistics computation, particularly for high order moments. Depending on the evolution of the work, the candidate will be given the opportunity to develop new generation methods in JAGUAR (FORTRAN language).


Candidate profile

The candidate must have a strong background in compressible fluid mechanics and turbulence. Moreover, basics of numerical simulations have to be mastered (numerical methods and schemes, boundary conditions, meshing). A former experience in unsteady simulation would be an asset for this internship. Finally, basics of programming is mandatory in order to work with the numerical solver. Within a research framework, the candidate, preparing a Master 2 (or equivalent), must be able to present his work to the entire team (written/oral). Working autonomously is also expected (bibliography, choice of developments, validation, etc.).



     ·   Ability to work in team

    ·    Initiative

    ·    Analysis and synthesis qualities