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Theses

Modélisation des réactions chimiques dans un code de simulation par la méthode Monte Carlo

Abstract : Direct Simulation Monte Carlo (DSMC) methods are used in Ariane group to compute aerodynamic forces and moments and heat fluxes on space objects for hypersonic flows in rarefied regimes.To caracterise the dislocation of the stages and the debris footprints, a precise modelisation of the mechanism that contribute to the heat flux is necessary. The contribution of the chemical reactions is important for the determination of the heat flux. The purpose of this thesis is to develop the in house IEMC tool using the DSMC method so that it can compute reactive flows.The different steps of the developments are presented in this work. The first step is the presentation, implementation and verification of two different chemistry models. They are validated for simulations on real test cases. Different models are tested in order to evaluate their effect. Chemical models implemented in the code depend on new input parameters, whose numerical data are uncertain. Using a uncertainty quantification study, it is shown that the output data of the reactive simulation, especially the heat flux, is weakly impacted by the tested uncertain parameters.
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https://tel.archives-ouvertes.fr/tel-02110304
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Submitted on : Thursday, April 25, 2019 - 12:23:18 PM
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77248_MERTZ_2019_archivage.pdf
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  • HAL Id : tel-02110304, version 1

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Helene Mertz. Modélisation des réactions chimiques dans un code de simulation par la méthode Monte Carlo. Probabilités [math.PR]. Université Paris-Saclay, 2019. Français. ⟨NNT : 2019SACLV012⟩. ⟨tel-02110304⟩

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