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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Local time-stepping for adaptive multiresolution using natural extension of Runge-Kutta methods

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Author(s):
Lopes, Muller Moreira [1, 2] ; Domingues, Margarete Oliveira [1, 3] ; Schneider, Kai [4] ; Mendes, Odim [1, 5]
Total Authors: 4
Affiliation:
[1] Natl Inst Space Res INPE, Av Astronautas 1758, BR-12227010 Sao Jose Dos Campos, SP - Brazil
[2] Grad Program Appl Comp CAP, Sao Jose Dos Campos - Brazil
[3] Coordinat Associated Labs CTE, Associate Lab Appl Comp & Math LAC, Sao Jose Dos Campos - Brazil
[4] Aix Marseille Univ, Inst Math Marseille, CNRS, Cent Marseille, 39 Rue F Joliot Curie, F-13453 Marseille 13 - France
[5] Coordinat Space Sci CEA, Space Geophys Div DGE, Sao Jose Dos Campos - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Journal of Computational Physics; v. 382, p. 291-318, APR 1 2019.
Web of Science Citations: 0
Abstract

A space-time fully adaptive multiresolution method for evolutionary non-linear partial differential equations is presented introducing an improved local time-stepping method. The space discretisation is based on classical finite volumes, endowed with cell average multiresolution analysis for triggering the dynamical grid adaptation. The explicit time scheme features a natural extension of Runge-Kutta methods which allow local time-stepping while guaranteeing accuracy. The use of a compact Runge-Kutta formulation permits further memory reduction. The precision and computational efficiency of the scheme regarding CPU time and memory compression are assessed for problems in one, two and three space dimensions. As application Burgers equation, reaction-diffusion equations and the compressible Euler equations are considered. The numerical results illustrate the efficiency and superiority of the proposed local time-stepping method with respect to the reference computations. (C) 2019 Elsevier Inc. All rights reserved. (AU)

FAPESP's process: 15/25624-2 - Development of multiscale modelling for non-linear local plasma instabilities of Astrophysics and Space Geophysics
Grantee:Margarete Oliveira Domingues
Support Opportunities: Regular Research Grants