Organisers
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Victorita Dolean, University of Strathclyde and Université Côte d’Azur
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Silvia Gazzola, University of Bath
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Ivan Graham, University of Bath
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Euan Spence, University of Bath
About:
This workshop brought together researchers working on wave problems, specifically:
- New discretization methods for frequency-domain wave problems and their analysis.
- Fast solvers for linear systems arising from frequency-domain wave problems (formulation, implementation, and analysis).
- Applications of the fast solvers (including to inverse problems, geophysical imaging, and electromagnetics).
Programme
| Monday 20 June | ||
| Ivan Graham, University of Bath | Morning Chair | |
| Registration | ||
| Welcome | ||
| Martin J. Gander, University of Geneva | Schwarz methods by domain truncation | |
| Frédéric Nataf, Laboratoire J.L. Lions, Sorbonne Université | A Unified View of Sweeping Algorithms for Helmholtz | |
| Refreshments | ||
| Ivan Graham, University of Bath | Convergence of the Restricted Additive Schwarz method with impedance boundary conditions for the Helmholtz equation. | |
| Axel Modave, CNRS - ENSTA Paris | A non-overlapping DDM with PML transmission conditions and checkerboard partitions for Helmholtz problems | |
| Lunch/Discussion | ||
| Victorita Dolean, University of Strathclyde | Afternoon Chair | |
| Pierre Jolivet, CNRS | Spectral coarse grids for overlapping Schwarz methods in PETSc | |
| Eike Mueller, University of Bath | Multigrid for climate- and weather prediction | |
| Refreshments | ||
| Jemma Shipton, University of Exeter | Towards parallel time stepping schemes for compatible finite element discretisations of the shallow water equations | |
| Pierre-Henri Tournier, Sorbonne Université, CNRS, Laboratoire Jacques-Louis Lions | Optimized Schwarz preconditioners for finite difference and finite element acoustic simulations | |
| Drinks Reception/Posters | ||
| Tuesday 21 June | ||
| Martin J. Gander, University of Geneva | Morning Chair | |
| Adrianna Gillman, University of Colorado Boulder | A robust discretization technique for three dimensional Helmholtz problems | |
| Alexander Heinlein, Delft University of Technology | A fully algebraic spectral coarse space for overlapping Schwarz methods | |
| Leonardo Zepeda-Núñez, Google Research | High-frequency limit of the inverse scattering problem: asymptotic convergence from inverse Helmholtz to inverse Liouville. | |
| Refreshments | ||
| Nicole Spillane, CNRS, Ecole Polytechnique | AWG, an algebraic solver for symmetric positive definite problems | |
| Zhiming Chen, Chinese Academy of Sciences | Efficient solvers for high-order explicit and implicit time finite element methods for the wave equation with discontinuous coefficients | |
| Lunch/Discussion | ||
| Christophe Geuzaine, Université de Liège | Afternoon Chair | |
| Cornelis Vuik, Delft University of Technology | Scalable solvers for the Helmholtz probem | |
| Lehel Banjai, Heriot-Watt University | Fractional wave equation in time and frequency-domain | |
| Refreshments | ||
| Omar Laghrouche & Nawfel Benatia, Heriot-Watt University & Cadi Ayyad University Marrakesh | Frequency domain Bernstein-Bézier finite element solver for modelling short waves - Applications to elastic and Maxwell wave simulations | |
| Jet Hoe Tang, ISTerre, Université Grenoble Alpes | Fully Scalable Solver for Frequency-Domain Visco-Elastic Wave Equations in 3D Heterogeneous Media | |
| Workshop Dinner, The Citizen | ||
| Wednesday 22 June | ||
| Cornelis Vuik, Delft University of Technology | Morning Chair | |
| Tristan van Leeuwen, Centrum Wiskunde & Informatica | Large-scale inverse problems with time-harmonic waves | |
| Hossein Aghamiry, Geoazur- University of Cote d'azur | LocalizedWavefield Inversion (LWI): an Adaptation of Multi-Block ADMM for Localized FWI | |
| Refreshments | ||
| Shaunagh Downing, University of Bath | Optimising Seismic Imaging via Bilevel Learning | |
| Romina Gaburro, University of Limerick | Stability and reconstruction in inverse problems. | |
| Lunch/Discussion | ||
| Optional Excursion to Loch Lomond | ||
| Thursday 23 June | ||
| Frederic Nataf, Laboratoire J.L. Lions, Sorbonne Université | Morning Chair | |
| Lise-Marie Imbert-Gerard, University of Arizona | Three types of quasi-Trefftz functions for the 3D convected Helmholtz equation | |
| Andrea Moiola, University of Pavia | Stable approximation of Helmholtz solutions by evanescent plane waves | |
| Barbara Verfürth, Karlsruhe Institute of Technology | Multiscale method for the nonlinear Helmholtz equation | |
| Refreshments | ||
| Théophile Chaumont-Frelet, Inria | Controllability methods: solving time-harmonic problems iteratively using time-domain solvers | |
| Xavier Claeys, Laboratoire Jacques-Louis Lions, Sorbonne Université | Non-local exchange operator for Optimized Schwarz Methods in general non-overlapping subdomain partitions | |
| Lunch/Discussion | ||
| Andrea Moiola, University of Pavia | Afternoon Chair | |
| Marcella Bonazzoli, Inria, Institut Polytechnique de Paris | Domain decomposition preconditioners for non-self-adjoint or non-positive-definite problems | |
| David Hewett, University College London | Accelerated Calderón preconditioning for Maxwell transmission problems | |
| Refreshments | ||
| Alexandre Kyriakis, University of Strathclyde | Schwarz algorithms for time-harmonic wave problems | |
| Hussam Al Daas, STFC, Rutherford Appleton Laboratory | Spectral multilevel algebraic domain decomposition preconditioners | |
| Workshop Dinner, The Corinthian Club | ||
| Friday 24 June | ||
| Pierre Jolivet, CNRS | Morning Chair | |
| Andrew Gibbs, University College London | Fully frequency-independent Hybrid Numerical Asymptotic Boundary Element Methods | |
| Niall Bootland, Rutherford Appleton Laboratory | GenEO for frequency-domain wave problems | |
| Refreshments | ||
| Jennifer Pestana, University of Strathclyde | Preconditioned Iterative Methods for Multilevel Toeplitz Matrices | |
| Victorita Dolean, University of Strathclyde | Two-level DDM preconditioners for Low Frequency Maxwell equations | |
| End of Workshop |