Title :

Entropy-dissipative discretization of nonlinear diffusion equations and discrete Beckner inequalities

Author(s) :

Chainais-Hillairet, Claire [Auteur]
Laboratoire Paul Painlevé - UMR 8524 [LPP]
Reliable numerical approximations of dissipative systems [RAPSODI]
Jüngel, Ansgar [Auteur]
Vienna University of Technology = Technische Universität Wien [TU Wien]
Schuchnigg, Stefan [Auteur]
Vienna University of Technology = Technische Universität Wien [TU Wien]

Journal title :

ESAIM: Mathematical Modelling and Numerical Analysis

Pages :

135-162

Publisher :

EDP Sciences

Publication date :

2016

ISSN :

0764-583X

HAL domain(s) :

Mathématiques [math]/Analyse numérique [math.NA]

English abstract : [en]

The time decay of fully discrete finite-volume approximations of porous-medium and fast-diffusion equations with Neumann or periodic boundary conditions is proved in the entropy sense. The algebraic or exponential decay ...
Show more >The time decay of fully discrete finite-volume approximations of porous-medium and fast-diffusion equations with Neumann or periodic boundary conditions is proved in the entropy sense. The algebraic or exponential decay rates are computed explicitly. In particular, the numerical scheme dissipates all zeroth-order entropies which are dissipated by the continuous equation. The proofs are based on novel continuous and discrete generalized Beckner inequalities. Furthermore, the exponential decay of some first-order entropies is proved in the continuous and discrete case using systematic integration by parts. Numerical experiments in one and two space dimensions illustrate the theoretical results and indicate that some restrictions on the parameters seem to be only technical.Show less >

Language :

Anglais

Popular science :

Non

ANR Project :

Centre Européen pour les Mathématiques, la Physique et leurs Interactions

Collections :

• Laboratoire Paul Painlevé - UMR 8524

Source :

Harvested from HAL