UMA Home page for Guillaume Legendre

Legendre
Guillaume
POEMS team
Room  ????
Phone ???
Photo de Guillaume Legendre
Ens/Chercheur

Maître de Conférence
Ph.D. 2003

Research activities

Research interests in a few keywords: modeling, aeroacoustics, electromagnetism, elastodynamics, fluid-structure interaction, chiral material, Arbitrary Lagrangian Eulerian, perfectly matched layers, controllability, partial differential equations, finite element methods, numerical analysis, scientific computing.
Brief summary: During my Ph.D. thesis, I worked, under the supervision of Anne-Sophie Bonnet-Ben Dhia, on aeroacoustics problems. More precisely, I dealt with the numerical resolution of the so-called Galbrun equation in the harmonic time-domain and using a finite element method. In the context of linear acoustics theory, this vectorial equation, established through a mixed Eulerian-Lagrangian reformulation of the linearized fluid mechanics equations, models the wave propagation in an inhomogeneous moving compressible inviscid fluid in adiabatic evolution and uses the Lagrangian displacement vector as dependent variable.

I was also interested in absorbing boundary conditions in aeroacoustics, notably the application of the Perfectly Matched Layers, introduced by J. Bérenger, in the harmonic time domain (work in collaboration with Éliane Bécache).

More recently, I worked with Patrick Ciarlet, Thierry Horsin and Serge Nicaise on the existence of solutions to Maxwell's equations in a chiral medium, with an application to exact boundary controllability.

During my postdoctoral stay at the Centro de Modelamiento Matemático (UMI 2807 CNRS-Universidad de Chile, Santiago, Chile) and in collaboration with Takéo Takahashi, I studied fluid-structure interaction problems and, more particularly, the convergence of a numerical method based on a finite element discretisation of an Arbitrary Lagrangian Eulerian (ALE) formulation of a viscous fluid/rigid body interaction problem. The major difficulties in such an analysis arise from the coupling between the equations of the fluid and those of the structure and from the free boundary of the domain.

Teaching activities (sorry, only french text)

  • Vacataire à l'université d'Évry-Val d'Essonne en 2001 et 2002.
  • Attaché temporaire d'enseignement et de recherche à l'université de Versailles Saint-Quentin-en-Yvelines pour l'année universitaire 2003/2004.
  • Attaché temporaire d'enseignement et de recherche à l'université Paris-Dauphine pour l'année universitaire 2004/2005.

Publications

Papers in peer-reviewed journals

2014

2011

2007

2006

2004

2001

International conferences with proceedings

2004

2003

Conferences without proceedings

2010

2005

2004

Doctoral these

2003

Research report

2009