High Order Relaxed Schemes for Nonlinear Reaction Diffusion Problems

Fausto Cavalli, M. Semplice

Risultato della ricerca: Contributo in libroContributo a convegno

Abstract

Different relaxation approximations to partial differential equations, including conservation laws, Hamilton-Jacobi equations, convection-diffusion problems, gas dynamics problems, have been recently proposed. The present paper focuses onto diffusive relaxed schemes for the numer- ical approximation of nonlinear reaction diffusion equations. High order methods are obtained by coupling ENO and WENO schemes for space discretization with IMEX schemes for time integration, where the implicit part can be explicitly solved at a linear cost. To illustrate the high accuracy and good properties of the proposed numericalschemes, also in the degenerate case, we consider various examples in one and two dimensions: the Fisher-Kolmogoroff equation, the porous-Fisher equation and the porous medium equation with strong absorption.
Lingua originaleEnglish
Titolo della pubblicazione ospiteSIMAI 2006
PagineN/A
Numero di pagine10
Stato di pubblicazionePubblicato - 2007
EventoSIMAI - Ragusa
Durata: 22 mag 200626 mag 2006

Convegno

ConvegnoSIMAI
CittàRagusa
Periodo22/5/0626/5/06

Keywords

  • relaxation schemes

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