• Doctorants - Post-doc,

Avis de soutenance de thèse de Zhaobin LI - ED SPI

Two-phase Spectral Wave Explicit Navires-ateliers Equations Method for Wave-Structure Interactions.

le 27 novembre 2018

Directeur de thèse : Pierre FERRANT

Laboratoire : LHEEA

Mardi 27 novembre à 14h30 à l'École Centrale de Nantes, Amphithéâtre S

Résumé : This thesis proposes an efficient algorithm for simulating wave-structure interaction with two-phase Computational Fluid Dynamics (CFD) solvers. The algorithm is based on the coupling of potential wave theory and two-phase Navier-Stokes equations. It is an extension of the Spectral Wave Explicit Navier-Stokes Equations (SWENSE) method for generalized two-phase CFD solvers with interface capturing technique. In this algorithm, the total solution is decomposed into an incident and a complementary component. The incident solution is explicitly obtained with spectral wave models based on potential flow theory; only the complementary solution is solved with CFD solvers, representing the influence of the structure on the incident waves. The decomposition ensures the accuracy of the incident wave’s kinematics regardless of the mesh in CFD solvers. A significant reduction of the mesh size is expected in typical wave-structure interaction problems.  The governing equations are given in three forms: the conservative form, the nonconservative form, and the Ghost of Fluid Method (GFM) form. The three sets of governing equations are implemented in OpenFOAM and validated by a series of wave-structure interaction cases. An efficient interpolation technique to map the irregular wave solution from a Higher-Order Spectral (HOS) Method onto the CFD grid is also proposed

La soutenance sera présentée devant le jury composé de :

Rapporteurs : Harry B. BINGHAM, Professeur, Technical University of Denmark (Denmark)
Rapporteurs :  Hrvoje JASAK, Professeur, University of Zagreb (Coratie) Examinateurs
Examinateurs :  Jun ZANG, Reader, University of Bath (Royaume Uni)
Examinateurs :  Pierre LUBIN, Professeur, Institut Polytechnique de Bordeaux 
Examinateurs :  Charles MONROY, Ingénieur de Recherche, Bureau Veritas
Directeur de thèse : Pierre  FERRANT,  Professeur, Centrale Nantes
Co-encadrant de thèse : Lionel GENTAZ, MdC, Centrale Nantes
Co-encadrant de thèse : Guillaume DUCROZET, MdC, Centrale Nantes
Publié le 20 novembre 2018 Mis à jour le 23 novembre 2018