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Theses

Développements et applications de la méthode SPH aux écoulements visqueux à surface libre.

Abstract : This thesis focuses on the development, validation and application of a numerical tool for free surface flows. Smoothed Particle Hydrodynamics (SPH) is a Lagrangian particle method, originally designed for the simulation of gravitational bodies in Astrophysics. Since the 90s, it has been extended to model free surface flows. Indeed, in the case of a large deformation of interfaces (wave breaking), the absence of mesh is particularly interesting. This property is also interesting to compute several liquid phases with different properties (water / sediment background for example). The applications are the wave propagation and its interaction with underwater obstacles. The SPH model was therefore established, starting from the bibliography, and validated in the case of a liquid drop stretching in the absence of gravity. Then, free-slip boundary conditions on rigid walls has been studied and applied to the collapse of a water column, followed by an impact on a vertical wall. Finally, the model has been extended to viscous flows. A new method for no-slip boundary conditions, inspired from the Immersed Boundary Method in finite differences, has been developed. It allows the simulation of flows around immersed objects with complex shapes. The model is finally applied to the waves propagation in a wave flume and its damping owing to the presence of a submerged horizontal plate.
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https://tel.archives-ouvertes.fr/tel-00607041
Contributor : Jean-Marc Cherfils <>
Submitted on : Thursday, July 7, 2011 - 5:03:31 PM
Last modification on : Thursday, June 13, 2019 - 3:07:47 PM
Long-term archiving on: : Saturday, October 8, 2011 - 2:36:13 AM

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  • HAL Id : tel-00607041, version 1

Citation

Jean-Marc Cherfils. Développements et applications de la méthode SPH aux écoulements visqueux à surface libre.. Mécanique [physics.med-ph]. Université du Havre, 2011. Français. ⟨tel-00607041⟩

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