UMA Home page for Stéphanie Chaillat
Researcher
Responsable projet COFFEE
Chargé de Recherche
Responsable projet COFFEE
Chargé de Recherche
Research Habilitation 2019
Ph.D. 2008
EMAIL_TEMPLATE
Research activities
- Numerical methods
- Boundary integral equations and boundary element method;
- Fast multipole method;
- Iterative and direct solvers; Preconditioning;
- Low-rank approximations; Fast Singular Value Decomposition;
- H-matrices;
- Inverse problems;
- Mechanics
- Acoustics in frequency domain;
- Elastodynamics in frequency domain;
- Viscoelastocity;
- Wave propagation;
- Seismology
- Seismic wave propagation;
- Site effects (seismic wave amplification in alluvial valleys);
Teaching activities
- 2015- : Boundary Element Methods, Ecole Doctorale Sciences, Ingénierie et Environnement, Université Paris Est.
- 2015- : Fast algorithms for the solution of scattering problems by Boundary Element Methods (D11-2), ENSTA, Palaiseau.
- 2012- : Functions of one complex variable (MA205), ENSTA, Palaiseau
- 2011- : Introduction to partial differential equations discretization (MA103), ENSTA, Palaiseau
Publications
Papers in peer-reviewed journals
Submitted
- A high-order discontinuous Galerkin Method using a mixture of Gauss-Legendre and Gauss-Lobatto quadratures for optimal efficiency and complexity
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submitted - H-matrix accelerated BEM-FEM coupling for dynamic analysis of naval structures under pulsating potential flow motion
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submitted - Solvability results for the transient acoustic scattering by an elastic obstacle
, and
submitted [
] 
2022
- Efficient evaluation of three-dimensional Helmholtz Green's functions tailored to arbitrary rigid geometries for flow noise simulations
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Journal of Computational Physics, vol. 452, mar, 2022 [ ] 
- Improvement of hierarchical matrices for 3D elastodynamic problems with a complex wavenumber
, and
Advances in Computational Mathematics, vol. 48, feb, 2022
2021
- Analytical preconditioners for Neumann elastodynamic Boundary Element Methods
, and
SN Partial Differential Equations and Applications, vol. 2, mar, 2021
2020
- A fast boundary element based solver for localized inelastic deformations
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International Journal for Numerical Methods in Engineering, vol. 121, pp. 5696--5718, 2020 - A fast boundary element method using the Z-transform and high-frequency approximations for large-scale 3D transient wave problems
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Int. J. Numer. Meth. Engng., vol. 121, pp. 4734-4767, 2020 - On the efficiency of nested GMRES preconditioners for 3D acoustic and elastodynamic H-matrix accelerated Boundary Element Methods
, and
Computers and Mathematics with Applications, vol. 80, pp. 471-489, aug, 2020
2019
- An efficient preconditioner for adaptive Fast Multipole accelerated Boundary Element Methods to model time-harmonic 3D wave propagation.
, and
Computer Methods in Applied Mechanics and Engineering, vol. 352, pp. 189-210, aug, 2019
2018
- Metric-based anisotropic mesh adaptation for 3D acoustic boundary element methods
, and
Journal of Computational Physics, vol. 372, pp. 473-499, nov, 2018
2017
- Fast iterative boundary element methods for high-frequency scattering problems in 3D elastodynamics
, and
Journal of Computational Physics, vol. 341, pp. 429–446, jul, 2017 - Theory and implementation of H-matrix based iterative and direct solvers for Helmholtz and elastodynamic oscillatory kernels
, and
Journal of Computational Physics, vol. 351, pp. 165–186, dec, 2017
2016
- Seismic Wave Amplification in 3D Alluvial Basins: 3D/1D Amplification Ratios from Fast Multipole BEM Simulations
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Bulletin of the Seismological Society of America, vol. 106 (3), pp. 1267-1281, Seismological Society of America, jun, 2016
2015
- A Wideband Fast Multipole Method for the Helmholtz Kernel: Theoretical Developments
and
Computers and Mathematics with Applications, vol. 70, pp. 660-678, 2015 
- Approximate local Dirichlet-to-Neumann map for three-dimensional elastic waves
, and
Computer Methods in Applied Mechanics and Engineering, vol. 297, pp. 62-83, dec, 2015
2014
- A new Fast Multipole formulation for the elastodynamic half-space Green's tensor
and
J. Comput. Phys., vol. 258, pp. 787-808, 2014 [ ]
2013
- Recent Advances on the Fast Multipole Accelerated Boundary Element Method for 3D time-harmonic Elastodynamics
and
Wave Motion, vol. 50, pp. 1090-1104, 2013
2012
- A preconditioned 3-D multi-region fast multipole solver for seismic wave propagation in complex geometries.
, and
Commun. Comput. Phys., vol. 11(2), pp. 594-609, 2012 - Application of the multi-level time-harmonic fast multipole BEM to 3-D visco-elastodynamics
, , and
Engineering Analysis with Boundary Elements, vol. 36, pp. 744-758, 2012 - FaIMS: A fast algorithm for the inverse medium problem with multiple frequencies and multiple sources for the scalar Helmholtz equation
and
Journal of Computational Physics, vol. 231(12), pp. 4403-4421, jun, 2012
2009
- A new fast multi-domain BEM to model seismic wave propagation and amplification in 3D geological structures
, and
Geophys. J. Int., vol. 177, pp. 509-531, 2009
2008
- A Fast Multipole accelerated BEM for 3-D elastic wave computation
, and
Revue Europeenne de Mecanique Numerique, vol. 17, pp. 701-712, 2008 - A multi-level fast multipole BEM for 3-D elastodynamics in the frequency domain
, and
Computer Methods in Applied Mechanics and Engineering, vol. 197, pp. 4233-4249, 2008
2007
- A Fast Multipole Method formulation for 3D elastodynamics in the frequency domain
, and
C. R. Mecanique, vol. 335, pp. 714-719, 2007 - Resolution of linear viscoelastic equations in the frequency domain using real Helmholtz boundary integral equations
and
Comptes Rendus Mecanique, vol. 335, pp. 746-750, 2007
International conference with proceedings
2017
- 3D metric-based anisotropic mesh adaptation for the fast multipole accelerated boundary element method in acoustics
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WAVES 2017 - 13th International Conference on Mathematical and Numerical Aspects of Wave Propagation (Minneapolis), may, 2017
Conferences without proceedings
2018
- Coupling BEMs in overlapping domains when a global Green’s function is not available
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IABEM 2018, Paris, may, 2018
2011
- Algorithme rapide et adaptatif pour le problème inverse de milieu en élastodynamique 3-D, avec fréquences et sources multiples
and
10e colloque national en calcul des structures, 2011 - Méthode multipôle rapide multi-niveaux en visco-élastodynamique 3D
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10e colloque national en calcul des structures, 2011
Habilitation these
2019
Doctoral these
2008
Research report
2015
Online talks
2020
- Virtual Seminar Series: Waves in Complex Continua (Wavinar)
Recent advances on the preconditioning of 3D fast Boundary Element Solvers for 3D acoustics and elastodynamics, https://www.icms.org.uk/V_Wavinar.php, jun, 2020 - Waves seminar at UC Merced
https://appliedmath.ucmerced.edu/seminars/imaging-and-sensing/waves, Recent advances on the preconditioning of 3D fast Boundary Element Solvers for 3D acoustics and elastodynamics, https://ucmerced.app.box.com/s/ej5o1khnmebbxugmngkkhxy50swkbkxn, oct, 2020