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Etude comparative des méthodes d'origine particulaire SPH et LBM pour la simulation d'écoulements polyphasiques intermittents dans des conduites

Abstract : The main objective of this thesis is to study the contributions and limitations of two particle- based methods, SPH and LBM, for the simulation of slug flows in pipes. In the petroleum industry, these flow regimes, found for example during the transportation of oil and gas from reservoirs to refinery facilities through pipelines, are highly undesirable because they are known to damage facilities and to reduce flow efficiency. Therefore, it is important to understand its formation. We have implemented both methods, as well as their multiphase variants, and have led a validation and comparison campaign in order to to select the most suited method and to continue with simulations of more applied and realistic cases. The main contributions of this work can summarized in 3 points. First, we had to write the necessary computation codes, validate them and compare the different multiphase formulations available for SPH and LBM. Then, we have developed inlet/outlet boundary conditions adapted to the multiphase context so that we are able to inject fluids with prescribed velocities and let them exit he domain with a given pressure. Finally, we have simulated different academic test cases of slug flows with SPH and LBM and then on applied cases with realistic geometries and air-water like density and viscosity ratios with SPH only.
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Submitted on : Tuesday, October 15, 2019 - 9:49:05 AM
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  • HAL Id : tel-02310293, version 2

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Thomas Douillet-Grellier. Etude comparative des méthodes d'origine particulaire SPH et LBM pour la simulation d'écoulements polyphasiques intermittents dans des conduites. Mathématiques générales [math.GM]. Université Paris Saclay (COmUE), 2019. Français. ⟨NNT : 2019SACLN030⟩. ⟨tel-02310293v2⟩

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