Description
CLIQUER ICI POUR REJOINDRE LA SALLE 1
Président.e de session : Elise Grosjean
Modérateur.trice : Matthieu Aussal
In this work, we implement a reduced-order model-based parareal method for solving the two-dimensional nonlinear shallow water equations and we propose a modification of the method for further stability and convergence improvements.
The parareal method was firstly introduced in [1] as an approach for overcoming the trade-off between high-fidelity results and computational costs when...
Le propergol solide est l’un des principaux combustibles utilisés dans les moteurs-fusées. Il s’agit d’un matériau solide composé généralement de particules d’oxydant mélangées dans une matrice de liant. Lorsque la surface du matériau est portée à haute température (typiquement 800K), une réaction de pyrolyse et de sublimation transforme la matière en surface en espèces gazeuses...
The problem of radiative transfer describes the interaction between light and matter, therefore it appears in many astrophysical systems, such as atmospheric physics (Chandrasekhar, 1960). Instead of solving a complex equation in a seven dimensional space, one can use a moment model by averaging over the direction of propagation to follow the radiative energy, flux, pressure, etc in a five...
Many phenomena in chemical physics involve calculating the electrostatic interaction between charged dielectric particles embedded in a polarisable continuum undergoing mutual polarisation. In order to tackle this problem, E. Lindgren et al. (J. Comput. Phys. 371 (2018): 712-731) have proposed a numerical method based on a Galerkin discretisation of a boundary integral equation (BIE) of the...
Considering two random variables with different laws to which we only have access through finite size iid samples, we address how to reweight the first sample so that its empirical distribution converges towards the true law of the second sample as the size of both samples goes to infinity. We study an optimal reweighting that minimizes the Wasserstein distance [1] between the empirical...
