Page of Stéphanie Chaillat

Stéphanie Chaillat		Researcher Responsable projet COFFEE Directeur de Recherche H.D.R. since 2019 PhD defended in 2008 Personal web page
ENSTA UMA office 2.2.26 Phone : (0) 18 187 2083

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);

Teachings

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

Papers in peer-reviewed journal

L. Pacaut, S. Chaillat, Mercier, S. Gilles

Efficient and accurate boundary integral method to evaluate scattering for coupled fluid-fluid problems excited by multiple sources (Submitted)

P. Romanet, M. Scuderi, J.-P. Ampuero, S. Chaillat, F. Cappa

Coupled Boundary Element and Finite Volume Methods for Modeling Fluid-Induced Seismicity in Fault Networks within Low-Permeability Rocks (Submitted)

M. Bonnet, S. Chaillat, A. Nassor

Solvability results for the transient acoustic scattering by an elastic obstacle (2024)

Journal of Mathematical Analysis and Applications - vol. 536 (pp 128198 )

S. Chaillat, G. Gerardi, A. Chamolly, Z.-h. Li, N. Ribe

The Sphericity Paradox and the Role of Hoop Stresses in Free Subduction on a Sphere (2024)

Journal of Geophysical Research - Solid Earth

S. Chaillat, B. Cotté, J.-F. Mercier, G. Serre, N. Trafny

Efficient evaluation of three-dimensional Helmholtz Green's functions tailored to arbitrary rigid geometries for flow noise simulations (2022)

Journal of Computational Physics - vol. 452

L. Bagur, S. Chaillat, P. Ciarlet

Improvement of hierarchical matrices for 3D elastodynamic problems with a complex wavenumber (2022)

Advances in Computational Mathematics - vol. 48

S. Chaillat, M. Darbas, F. Le Louër

Analytical preconditioners for Neumann elastodynamic Boundary Element Methods (2021)

SN Partial Differential Equations and Applications - vol. 2

F. Kpadonou, S. Chaillat, P. Ciarlet

On the efficiency of nested GMRES preconditioners for 3D acoustic and elastodynamic H-matrix accelerated Boundary Element Methods (2020)

Computers and Mathematics with Applications - vol. 80 (pp 471-489 )

D. Mavaleix-Marchessoux, M. Bonnet, S. Chaillat, B. Leblé

A fast boundary element method using the Z-transform and high-frequency approximations for large-scale 3D transient wave problems (2020)

Int. J. Numer. Meth. Engng. - vol. 121 (pp 4734-4767 )

F. Ciardo, B. Lecampion, F. Fayard, S. Chaillat

A fast boundary element based solver for localized inelastic deformations (2020)

International Journal for Numerical Methods in Engineering - vol. 121 (pp 5696--5718 )

F. Amlani, S. Chaillat, A. Loseille

An efficient preconditioner for adaptive Fast Multipole accelerated Boundary Element Methods to model time-harmonic 3D wave propagation. (2019)

Computer Methods in Applied Mechanics and Engineering - vol. 352 (pp 189-210 )

S. Chaillat, S. Groth, A. Loseille

Metric-based anisotropic mesh adaptation for 3D acoustic boundary element methods (2018)

Journal of Computational Physics - vol. 372 (pp 473-499 )

S. Chaillat, M. Darbas, F. Le Louër

Fast iterative boundary element methods for high-frequency scattering problems in 3D elastodynamics (2017)

Journal of Computational Physics - vol. 341 (pp 429–446 )

S. Chaillat, L. Desiderio, P. Ciarlet

Theory and implementation of H-matrix based iterative and direct solvers for Helmholtz and elastodynamic oscillatory kernels (2017)

Journal of Computational Physics - vol. 351 (pp 165–186 )

K. Meza Fajardo, J.-F. Semblat, S. Chaillat, L. Lenti

Seismic Wave Amplification in 3D Alluvial Basins: 3D/1D Amplification Ratios from Fast Multipole BEM Simulations (2016)

Bulletin of the Seismological Society of America - Seismological Society of America - vol. 106 (3) (pp 1267-1281 )

S. Chaillat, F. Collino

A Wideband Fast Multipole Method for the Helmholtz Kernel: Theoretical Developments (2015)

Computers and Mathematics with Applications - vol. 70 (pp 660-678 )

S. Chaillat, M. Darbas, F. Le Louër

Approximate local Dirichlet-to-Neumann map for three-dimensional elastic waves (2015)

Computer Methods in Applied Mechanics and Engineering - vol. 297 (pp 62-83 )

S. Chaillat, M. Bonnet

A new Fast Multipole formulation for the elastodynamic half-space Green's tensor (2014)

J. Comput. Phys. - vol. 258 (pp 787-808 )

S. Chaillat, M. Bonnet

Recent Advances on the Fast Multipole Accelerated Boundary Element Method for 3D time-harmonic Elastodynamics (2013)

Wave Motion - vol. 50 (pp 1090-1104 )

S. Chaillat, J.-F. Semblat, M. Bonnet

A preconditioned 3-D multi-region fast multipole solver for seismic wave propagation in complex geometries. (2012)

Commun. Comput. Phys. - vol. 11(2) (pp 594-609 )

S. Chaillat, G. Biros

FaIMS: A fast algorithm for the inverse medium problem with multiple frequencies and multiple sources for the scalar Helmholtz equation (2012)

Journal of Computational Physics - vol. 231(12) (pp 4403-4421 )

E. Grasso, S. Chaillat, M. Bonnet, J.-F. Semblat

Application of the multi-level time-harmonic fast multipole BEM to 3-D visco-elastodynamics (2012)

Engineering Analysis with Boundary Elements - vol. 36 (pp 744-758 )

International conference with proceedings

F. Amlani, S. Chaillat, S. Groth, A. Loseille

3D metric-based anisotropic mesh adaptation for the fast multipole accelerated boundary element method in acoustics (2017)

Conferences without proceedings

A.-S. Bonnet-BenDhia, S. Chaillat, S. Fliss, Y. Tjandrawidjaja

Coupling BEMs in overlapping domains when a global Green’s function is not available (2018)

IABEM 2018, Paris

E. Grasso, S. Chaillat, J.-F. Semblat, M. Bonnet

Méthode multipôle rapide multi-niveaux en visco-élastodynamique 3D (2011)

10e colloque national en calcul des structures

S. Chaillat, G. Biros

Algorithme rapide et adaptatif pour le problème inverse de milieu en élastodynamique 3-D, avec fréquences et sources multiples (2011)

10e colloque national en calcul des structures

H.D.R.

S. Chaillat

Contributions to the modelling of acoustic and elastic wave propagation in large-scale domains with boundary element methods (2019)

Research reports

S. Chaillat, R. Cottereau, R. Sevilla

A high-order discontinuous Galerkin Method using a mixture of Gauss-Legendre and Gauss-Lobatto quadratures for improved efficiency (2022)

D. Mavaleix-Marchessoux, M. Bonnet, S. Chaillat, B. Leblé

H-matrix accelerated BEM-FEM coupling for dynamic analysis of naval structures under pulsating potential flow motion (2022)

S. Chaillat, F. Collino

A Wideband Fast Multipole Method for the Helmholtz kernel: Theoretical developments (2015)

Online talks

S. Chaillat

Fast Boundary Element solvers in the frequency domain to simulate coupled acoustic-elastic problems in the time domain. Application to the simulation of underwater explosions (2023)

S. Chaillat

Virtual Seminar Series: Waves in Complex Continua (Wavinar) (2020)

S. Chaillat

Waves seminar at UC Merced (2020)

Recent advances on the preconditioning of 3D fast Boundary Element Solvers for 3D acoustics and elastodynamics

Wave propagation : Mathematical Studies and Simulation	Members > Page of Stéphanie Chaillat
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