Portrait of Stéphanie Chaillat-Loseille
Stéphanie Chaillat-Loseille

CNRS Research Director

Deputy Director, POEMS

My research lies at the interface between computational mechanics and applied mathematics. Its central objective is to develop reliable and efficient methods for wave-propagation problems in configurations that retain the complexity of the underlying physics. I combine mathematical analysis, numerical-method development and high-performance scientific computing, working in close interaction with academic and industrial partners.

Selected computational results

Research directions

Wave propagation in complex media

I study acoustic and elastic wave propagation in heterogeneous and layered media, multiple-scattering configurations, and coupled acoustic–elastic systems. My aim is to move beyond idealized model problems towards realistic geometries and physical configurations, with applications in seismology, underwater acoustics and flow-induced noise.

Fast and scalable numerical methods

I develop boundary element methods, fast multipole and hierarchical-matrix techniques, domain-decomposition methods, analytical preconditioners and anisotropic mesh-adaptation strategies for large-scale wave simulations. Alongside the mathematical analysis, I directly design, implement and validate the high-performance research codes used to assess these methods and perform large-scale simulations.

Learning-accelerated simulation

More recently, I have been exploring machine-learning and operator-learning approaches to reduce the computational cost of large-scale and repeated wave simulations, while preserving the physical structure, robustness and accuracy of classical numerical methods.

Current projects and partnerships

Naval Group Since 2017
Modeling of underwater explosions and the noise generated by turbulent flows (PhD funding for A. Nassor, D. Mavaleix-Marchessoux, N. Trafny, and L. Pacaut)
Naval Group
Sercel Since 2022
Development of stable numerical methods for the modeling of bubble dynamics
Sercel
ECOS Sud Chili Since 2024
Multitrace formulation for elastodynamics problems (with M. Darbas, C. Jerez-Hanckes and P. Escapil-Inchauspé)
ANR IM-Surf Since 2025
Impact and Mitigation of seismic SURFace waves on Large 3D Structures (PhD funding for Louis Auffret)
ANR IM-Surf
These projects support doctoral and postdoctoral research and contribute to long-term academic and industrial collaborations. See Supervision and Publications for related work and outcomes.

Earlier funding

2013–2025. ANR DynImplant (2022–2025); ANR MODULATE (2018–2022); DGA postdoctoral fellowship (2018); EDF and Shell industrial PhD contracts (2013–2016); ANR RAFFINE (2013–2016).