Title: Macroscopic limits of collective dynamics with time-varying weights Summary: We introduce an augmented model for first-order opinion dynamics, in which a weight of influence is attributed to each agent. Each agent’s influence on another agent’s opinion is then proportional not only to the classical interaction function, but also to the agent’s…
Title : Some remarks on the convergence of GMRES with weighted norms, preconditioning and deflation Summary : GMRES is a very well established iterative solver for general linear systems. At iteration k, it computes the approximate solution x_k to the linear system Ax = b that minimizes the norm of…
Title : Stochastic approach for reduced models in numerics for fluid mechanics. Application to wind time series. Summary : During this presentation, I will introduce the fluid particle method for turbulent CFD. This physical model is Lagrangian and stochastic. These two particularities help us to construct from the 3D+time equations…
Title: low Mach two-phase flow modeling with high heat transferts Summary: In this presentation, we are interested with modeling the flow of a heat transfert fluid (water) inside a nuclear reactor core. To this purpose, we first present a low Mach simplified model with three equations (obtained as the low…
Title: Local L2 Bounded projections in finite element exterior calculus Summary: Finite element exterior calculus (FEEC) is an elegant framework that uses a complex of finite elements in any spatial dimension and can approximate solutions to the Hodge-Laplacian. The finite element complex on simplicial meshes can be thought of as…
