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Schwarz waveform relaxation methods: optimized interface conditions and short time behavior

Contributeurs/tricesCourvoisier, Yves
Directeurs/tricesGander, Martin Jakob
Date de soutenance2011-09-29
Résumé

Schwarz waveform relaxation algorithms (SWR) are naturally parallel solvers for evolution partial differential equations. They are based on a decomposition of the spatial domain into subdomains, and a partition of the time interval of interest into time windows. On each time window, an iteration, during which subproblems are solved in space-time subdomains, is then used to obtain better and better approximations of the overall solution. The information exchange between subdomains in space-time is performed through classical or optimized transmission conditions (TCs). We analyze in this Thesis the SWR algorithm in three different contexts. First, we apply for the first time the SWR method to the evolution Maxwell's equation and deploy an advanced analysis of the convergence of the algorithm. A further analysis of the TCs is leading to optimized TCs and optimized parameters used in the optimal TCs. A second chapter is devoted to the heat equation. Proof of convergences in very general contexts and the behavior of the SWR method for short time windows is analyzed. Finally, a first approach of the SWR algorithm applied to systems of reaction-diffusion equations is proposed, and an optimized version of TCs is analyzed leading to optimal parameters involved in the optimized TCs.

eng
Mots-clés
  • Schwarz waveform relaxation
  • Optimized robin transmission conditions
  • Heat
  • Maxwell
  • Reaction-diffusion
  • Numerical analysis
  • Partial differential equation
  • Domain decomposition
Citation (format ISO)
COURVOISIER, Yves. Schwarz waveform relaxation methods: optimized interface conditions and short time behavior. 2011. doi: 10.13097/archive-ouverte/unige:17867
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Informations techniques

Création20/12/2011 15:55:00
Première validation20/12/2011 15:55:00
Heure de mise à jour14/03/2023 17:06:02
Changement de statut14/03/2023 17:06:01
Dernière indexation29/01/2024 19:19:33
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