Monday 17th March 2025 – INRIA : Fabien Vergnet (Sorbonne Université)
Title: TBA Abstract TBA
Category: Séminaire 2024/2025
Monday 3rd March 2025 – LJLL : Claire Boyer (Université Paris-Saclay)
Title: TBA Abstract TBA
Monday 3rd February 2025 – LJLL : Maha Daoud (ENSTA Paris)
Title: A class of parabolic fractional reaction-diffusion systems with control of total mass: Theory and numerics Abstract: In this talk based on [1, 2], we present some new results about global-in-time existence of strong solutions to a class of fractional parabolic reaction–diffusion systems posed in a bounded open subset of…
Monday 20th January 2025 – Visio : Tabea Tscherpel (TU Darmstadt)
Title: Energy consistent time discretisation of port-Hamiltonian systems Abstract Various ordinary and partial differential equations arising from physics can be written as port-Hamiltonian systems. Their Hamiltonian function represents an energy that is conserved or dissipated along solutions. Numerical schemes are energy consistent, if the Hamiltonian is preserved or dissipated also…
Monday 6th January 2025 – LJLL : Joyce Ghantous (Inria Bordeaux)
Title: Curved meshes for a diffusion problem with a surface Laplacian Abstract We study a diffusion problem with boundary conditions that involve a surface Laplacian. We present the numerical analysis of a high-order finite element discretization. A smooth domain is considered for the definition of this boundary operator. The discrtized…
Thursday 19th December 2024 – LJLL : Zhao Junming (Harbin Institute of Technology, China)
Title: Photon tunneling heat transfer in particulate system: physical characteristics and homogenization theory Abstract Radiative transfer equation (RTE) is the commonly accepted continuum scale governing equation for radiative heat transfer in particulate system. However, its applicability is questionable for non-random, densely and regularly packed particulate systems, due to dependent scattering…
Thursday 19th December 2024 – LJLL : Diane Guignard (University of Ottawa, Canada)
Title: Approximating partial differential equations with missing input data Abstract We consider the problem of numerically approximating the solution of partial differential equations for which not all the input data are known. A situation of particular interest is when the boundary conditions are unknown, or only partially known. To alleviate…
Monday 16th December 2024 – LJLL : Bertrand Maury (Université Paris-Sud)
Title: Hilbertian degenerations Abstract We study problems involving entities to which a “mass” is attached. This quantity can actually be a mass in the usual sense for systems of particles, but it can also be a thermal capacity in the context of heat transfer, or a kind of charisma in…
Monday 9th December 2024 – LJLL : Alena Kopanicakova (Université de Toulouse)
Title: Towards trustworthy use of scientific machine-learning in large-scale numerical simulations Abstract Recently, scientific machine learning (SciML) has expanded the capabilities of traditional numerical approaches by simplifying computational modeling and providing cost-effective surrogates. However, SciML models suffer from the absence of explicit error control, a computationally intensive training phase, and…
Monday 2nd December 2024 – LJLL : Ondřej Kincl (University of Trento, Italy)
Title: A semi-implicit numerical scheme based on moving Voronoi cells Abstract In this talk, I will explain how moving Voronoi grids can be used in computational fluid dynamics. Following the papers of Bruno Després [1] and Volker Springel [2], we pursue a method for compressible Navier-Stokes equations that is as…
Monday 3rd March 2025 – LJLL : Claire Boyer (Université Paris-Saclay)
Title: TBA Abstract TBA
Monday 3rd February 2025 – LJLL : Maha Daoud (ENSTA Paris)
Title: A class of parabolic fractional reaction-diffusion systems with control of total mass: Theory and numerics Abstract: In this talk based on [1, 2], we present some new results about global-in-time existence of strong solutions to a class of fractional parabolic reaction–diffusion systems posed in a bounded open subset of…
Monday 20th January 2025 – Visio : Tabea Tscherpel (TU Darmstadt)
Title: Energy consistent time discretisation of port-Hamiltonian systems Abstract Various ordinary and partial differential equations arising from physics can be written as port-Hamiltonian systems. Their Hamiltonian function represents an energy that is conserved or dissipated along solutions. Numerical schemes are energy consistent, if the Hamiltonian is preserved or dissipated also…
Monday 6th January 2025 – LJLL : Joyce Ghantous (Inria Bordeaux)
Title: Curved meshes for a diffusion problem with a surface Laplacian Abstract We study a diffusion problem with boundary conditions that involve a surface Laplacian. We present the numerical analysis of a high-order finite element discretization. A smooth domain is considered for the definition of this boundary operator. The discrtized…
Thursday 19th December 2024 – LJLL : Zhao Junming (Harbin Institute of Technology, China)
Title: Photon tunneling heat transfer in particulate system: physical characteristics and homogenization theory Abstract Radiative transfer equation (RTE) is the commonly accepted continuum scale governing equation for radiative heat transfer in particulate system. However, its applicability is questionable for non-random, densely and regularly packed particulate systems, due to dependent scattering…
Thursday 19th December 2024 – LJLL : Diane Guignard (University of Ottawa, Canada)
Title: Approximating partial differential equations with missing input data Abstract We consider the problem of numerically approximating the solution of partial differential equations for which not all the input data are known. A situation of particular interest is when the boundary conditions are unknown, or only partially known. To alleviate…
Monday 16th December 2024 – LJLL : Bertrand Maury (Université Paris-Sud)
Title: Hilbertian degenerations Abstract We study problems involving entities to which a “mass” is attached. This quantity can actually be a mass in the usual sense for systems of particles, but it can also be a thermal capacity in the context of heat transfer, or a kind of charisma in…
Monday 9th December 2024 – LJLL : Alena Kopanicakova (Université de Toulouse)
Title: Towards trustworthy use of scientific machine-learning in large-scale numerical simulations Abstract Recently, scientific machine learning (SciML) has expanded the capabilities of traditional numerical approaches by simplifying computational modeling and providing cost-effective surrogates. However, SciML models suffer from the absence of explicit error control, a computationally intensive training phase, and…
Monday 2nd December 2024 – LJLL : Ondřej Kincl (University of Trento, Italy)
Title: A semi-implicit numerical scheme based on moving Voronoi cells Abstract In this talk, I will explain how moving Voronoi grids can be used in computational fluid dynamics. Following the papers of Bruno Després [1] and Volker Springel [2], we pursue a method for compressible Navier-Stokes equations that is as…
