HAL : hal-00587036, version 2

arXiv : 1104.3697

DOI : 10.1142/S1793744211000412

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Confluentes Mathematici 3 (2011) 1-31

Versions disponibles :

v1 (19-04-2011)

v2 (31-07-2011)

Adaptive time splitting method for multi-scale evolutionary partial differential equations

Stéphane Descombes 1, Max Duarte (  Auteur correspondant ) 2, Thierry Dumont 3, 4, Violaine Louvet 3, 4, Marc Massot 2

(21/07/2011)

This paper introduces an adaptive time splitting technique for the solution of stiff evolutionary PDEs that guarantees an effective error control of the simulation, independent of the fastest physical time scale for highly unsteady problems. The strategy considers a second order Strang method and another lower order embedded splitting scheme that takes into account potential loss of order due to the stiffness featured by time-space multi-scale phenomena. The scheme is then built upon a precise numerical analysis of the method and a complementary numerical procedure, conceived to overcome classical restrictions of adaptive time stepping schemes based on lower order embedded methods, whenever asymptotic estimates fail to predict the dynamics of the problem. The performance of the method in terms of control of integration errors is evaluated by numerical simulations of stiff propagating waves coming from nonlinear chemical dynamics models as well as highly multi-scale nanosecond repetitively pulsed gas discharges, which allow to illustrate the method capabilities to consistently describe a broad spectrum of time scales and different physical scenarios for consecutive discharge/post-discharge phases.

1 :	Laboratoire Jean Alexandre Dieudonné (JAD)
	CNRS : UMR6621 – Université Nice Sophia Antipolis [UNS]
2 :	Laboratoire d'Énergétique Moléculaire et Macroscopique, Combustion (EM2C)
	CNRS : UPR288 – Ecole Centrale Paris
3 :	Institut Camille Jordan (ICJ)
	CNRS : UMR5208 – Université Claude Bernard - Lyon I – Ecole Centrale de Lyon – Institut National des Sciences Appliquées (INSA) - Lyon
4 :	NUMED (ENS Lyon / UCB Lyon / Inria Grenoble Rhône-Alpes)
	Université Claude Bernard - Lyon I – INRIA – École Normale Supérieure - Lyon – CNRS : UMR5669 – Unité de Mathématiques Pures et Appliquées

Domaine

:

Mathématiques/Analyse numérique Physique/Physique/Physique Numérique Sciences de l'ingénieur/Plasmas

Mots Clés : Time adaptive integration – error control – operator splitting – reaction-diffusion – multi-scale reaction waves – multi-scale discharge

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Contributeur : Marc Massot <>

Soumis le : Dimanche 31 Juillet 2011, 11:14:47

Dernière modification le : Vendredi 18 Janvier 2013, 14:51:17