CHAUMONT-FRELET Théophile

Thèse avec INRIA Magique 3D, Pau

  • Page personnelle : https://tchaumont.github.io/
  • Thèmes de recherche/Research topics: PDE, numerical analysis, modelling and numerical simulation, HPC. Applications.
  • Thèse/Ph. D thesis: 2012-2015
  • Financement/Grant: INRIA Bordeaux Sud Ouest (MAGIQUE3D >>>)
  • Encadrement/Ph. D advisors: H. Barucq, INRIA (50%) et C. Gout (50%)
  • Equipe/Team: "Analyse Numérique, Imagerie et Approximation" pour le LMI, & EPI MAGIQUE 3D pour INRIA.
  • Situation après la thèse : Postdoc au Basque Center for Applied Math., BCAM, Bilbao, Espagne (2016/18) : http://www.bcamath.org/en/people/tchaumont
    Depuis janvier 2018 : Post-doctoral fellow at CERMICS and Inria project-team SERENA
  • Titulaire du label C3I (Certificat de Compétences en Calcul Intensif) du GENCI, 2017.

 Thèse soutenue le 11 décembre 2015 devant le jury suivant :

  • M. Serge Nicaise, Univ. Valenciennes - Président du Jury
  • Mme Carole Le Guyader,  INSA Rouen
  • M. Christian Gout,  INSA Rouen -   Directeur de thèse
  • M. Henri Calandra, Total Houston, USA
  • Mme Hélène Barucq, INRIA, Directrice de thèse
  • M. Markus Melenk, TU Wien, Autriche, Rapporteur
  • M. Grégoire Allaire, Ecole Polytechnique, Rapporteur
  • M. Rémi Abgrall, Universität Zürich, Suisse - Rapporteur

Publications (revues)

  • T. Chaumont-Frelet, D. Pardo and A. Rodriguez-Rozas. Finite element simulations of logging-while-drilling and extra-deep azimuthal resitivity measurements using non-fitting grids. Accepted for publication in Comput. Geosci., 2018..
  • T. Chaumont-Frelet, S. Nicaise, D. Pardo Finite element approximation of electrocmagnetic fields using non-fitting meshes for Geophysics, accepté pour publication SIAM J. Numer. Anal. (avril 2018).
  • T. Chaumont-Frelet, S. Nicaise, High-frequency behaviour of corner singularities in Helmholtz problems, accepté pour publication dans M2AN (2018).
  • H. Barucq, T. Chaumont-Frelet, C. Gout, Stability Analysis of Heterogeneous Helmholtz Problems and Finite Element Solution Based on Propagation Media Approximation, Mathematics of Computation, Volume 86, Number 307, Pages 2129–2157, 2017. 
  • H. Barucq, T. Chaumont Frelet, J. Diaz, V. Péron: Upscaling for the Laplace problem using a discontinuous Galerkin method, Journal of Computational and Applied Mathematics Vol. 240, pp. 192-203, 2013.
  • T. Chaumont-Frelet, On high order methods for the Helmholtz equation in highly heterogeneous media, Computers and Mathematics with Applications, Vol. 72, Issue 9, pp. 2203-2225, 2016.

Publications (soumises dans des revues)

  • T. Chaumont-Frelet, H. Barucq, H. Calandra, C. Gout, The Multiscale Medium Approximation Method in Geophysics, soumis à Computational Geosciences, 2017.
  • T. Chaumont-Frelet and S. Nicaise. Wavenumber explicit convergence analysis for finite element discretizations of general wave propagation problems. Submitted to IMA J. Numer. Anal., 2018.
  • T. Chaumont-Frelet, M. Shahriari and D. Pardo. Adjoint-based formulation for computing derivatives with respect to bed boundary positions in resistivity geophysics. Submitted to Geophysical Prospecting, 2018.

Proceedings

  • H. Barucq, H. Calandra, T. Chaumont Frelet, C. Gout, Multiscale medium approximation: Application to geophysical benchmarks, 7th EAGE Saint Petersburg International Conference and Exhibition: Understanding the Harmony of the Earth's Resources Through Integration of Geosciences pp. 79-83, 2016.

Conferences (communications) - (speaker: T. Chaumont-Frelet)

  • Saint Petersburg (Russia) 2016 International Conference & Exhibition Understanding the Harmony of the Earth’s Resources through Integration of Geosciences, Multiscale Medium Approximation: application to geophysical benchmarks, H. Barucq, H. Calandra, T. Chaumont-Frelet, C. Gout, 2016.
  • 1st. Pan-American Congress on Computational Mechanics, Buenos Aires, Argentina, Helmholtz Equation in Highly Heterogeneous Media, April 27-29, 2015.
  • Workshop "Modelling and Numerical Simulation / HPC", february 19, 2015, at the Numerical Simulation and Modeling of turbulent Combustion Lab. (CORIA) at Rouen >>>>, Analysis of the Pollution Effect in Finite Element Discretization of Highly Heterogeneous Helmholtz Problems,  T. Chaumont-Frelet.
  • 11th World Congress on Computational Mechanics, Barcelone (Espagne,) Helmholtz equation in highly heterogeneous media, H. Barucq, H. Calandra, T. Chaumont-Frelet and C. Gout, Juillet 2014.
  • Multiphysics, Multiscale, and Optimization Problems, Bilbao, (Espagne), Helmholtz Equation in Highly Heterogeneous Media: a Two-Scale Analysis, H. Barucq, H. Calandra, T. Chaumont Frelet, C. Gout, May 2014.
  • SMAI 2013 à Seignosse, (France), Residual-free bubbles pour l’équation d’Helmholtz, Théophile Chaumont-Frelet, 2013.
  • HOSCAR – 3rd Brazil-French workshop on High performance cOmputing and SCientific dAta management dRiven by highly demanding applications (INRIA-CNPq), Bordeaux (France), The Multiscale Hybrid Mixed Method for the Helmholtz Equation, H. Barucq; H. Calandra; T. Chaumont Frelet; C. Gout; F. Valentin, 2013.
  • HOSCAR -- 2nd Brazil-French workshop on High performance cOmputing and SCientific dAta management dRiven by highly demanding applications (INRIA-CNPq), Petropolis (Brésil), Upscaling for the Laplace equation, 2013.
  • NSF conferenceon Barycentric Coordinates in Geometry Processing and Finite/Boundary Element Methods at Columbia University, New York (USA), Upscaling method using a Discontinuous Galerkin Method, T. Chaumont, H. Barucq, J. Diaz, C. Gout, V. Peron, 25-28 juillet 2012.

Other research activities/Invitations

  • Invité à / Visiting scholar at Houston (mars/march 2015).
  • Séminaire à / Seminar at UC Berkeley/LBL le 25 février/february 25, 2015 <Abstract>.
  • Invité à / Visiting scholar at INRIA Sophia Antipolis, 23-30 novembre 2014 (INRIA Nachos)
  • Invité à / Visiting scholar at Houston (USA), 3 semaines, octobre/novembre 2014 (Avec H. Calandra, Total).
  • Invité à / Visiting scholar at Houston (USA), 1 mois, avril 2014 (Avec H. Calandra, Total).
  • Participation à la semaine Math-Industrie (Labex AMIES) du 15 au 19 octobre 2012, IHP Paris.
  • Preprint: Image segmentation with a priori conditions: application to non invasive assessment of pulmonary arterial hypertension, T. Chaumont-Frelet, C. Gout et C. Le Guyader, mémoire de Master/Projet de Fin d'Etudes, INSA de Rouen, 2012.
  • Quelques résultats en Homogénéisation, T. Chaumont-Frelet, P. Donato, mémoire de Master, Rouen, 2012.

Teaching / Enseignement

  • TD STPI - niveau L1-L2, Analysis/Analyse,  INSA de Rouen en 2014/15 (40h)
  • TD Numerical methods for PDE/Méthodes numériques pour les EDP, 2014/15, Génie Mathématique 4ème année - niveau M1 / Level : Master's degree.
  • TD STPI - niveau L1-L2, Analysis/Analyse, INSA de Rouen en 2013/14 (40h)
  • TD Finite elements/Eléments finis, 2013/14, Génie Mathématique 4ème année - niveau M1 / Level : Master's degree.

Encadrement / student supervision

  • Propagation media approximation for the time-domain wave equation using GPU, INSA Rouen
    (France), Master's thesis of Conrad Hillairet (INSA Rouen).

Projets

  • Porteur (2016/18) du "Project of the Spanish Ministry of Economy and Competitiveness with reference MTM2016-76329-R"
  • Membre du projet M2NUM (Normandie et FEDER Europe)
  • Membre du projet DIP (INRIA MAGIQUE3D et Total)

Administrative activities / Activités administratives

  • Member of the national INRIA committee for Ph. Students / Membre de la commission consultative des doctorants contractuels d’INRIA.

Cursus

  • 2012: National Institute of Applied Sciences at Rouen (INSA Rouen) : Engineer in Applied Mathematics (Grade A+) / Ingénieur INSA de Rouen (Génie Mathématique) en 2012.
  • 2012 : Fundamental and Applied Mathematics Master at Rouen (Grade A+) / Master Mathématiques Fondamentales et Appliquées, Rouen en 2012 (mention Très Bien).