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EnglishIn this work we present an efficient strategy to deal with plasma physics simulations in which localized departures from thermodynamical equilibrium are present. The method is based on the introduction of intermediate regions which allows smooth transitions between kinetic and fluid zones. In this paper we extend Domain Decomposition techniques, obtained through dynamic coupling and buffer zones, to the study of plasmas and, moreover, we combine them with Asymptotic Preserving and Asymptotically Accurate strategies for the time integration. We use a hybrid scheme in which both kinetic and fluid descriptions are considered and coupled together while the kinetic model is solved by asymptotic preserving and accurate methods, in order to guarantee high efficiency and accuracy in all regimes. The numerical scheme is validated and its performances are analyzed by numerical simulations. © 2014 Elsevier Inc.
| Data di pubblicazione: | 2014 | |
| Titolo: | An asymptotic preserving automatic domain decomposition method for the Vlasov-Poisson-BGK system with applications to plasmas | |
| Autori: | Dimarco, Giacomo; Mieussens, Luc; Rispoli, Vittorio | |
| Rivista: | JOURNAL OF COMPUTATIONAL PHYSICS | |
| Keywords: | Asymptotic accuracy; Asymptotic preservation; Kinetic-fluid coupling; Plasmas simulations; Vlasov-BGK-Poisson system; Physics and Astronomy (miscellaneous); Computer Science Applications1707 Computer Vision and Pattern Recognition | |
| Abstract in inglese: | In this work we present an efficient strategy to deal with plasma physics simulations in which localized departures from thermodynamical equilibrium are present. The method is based on the introduction of intermediate regions which allows smooth transitions between kinetic and fluid zones. In this paper we extend Domain Decomposition techniques, obtained through dynamic coupling and buffer zones, to the study of plasmas and, moreover, we combine them with Asymptotic Preserving and Asymptotically Accurate strategies for the time integration. We use a hybrid scheme in which both kinetic and fluid descriptions are considered and coupled together while the kinetic model is solved by asymptotic preserving and accurate methods, in order to guarantee high efficiency and accuracy in all regimes. The numerical scheme is validated and its performances are analyzed by numerical simulations. © 2014 Elsevier Inc. | |
| Digital Object Identifier (DOI): | 10.1016/j.jcp.2014.06.002 | |
| Handle: | http://hdl.handle.net/11392/2356424 | |
| Appare nelle tipologie: | 03.1 Articolo su rivista |
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| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| Vittorio.pdf | Full text editoriale | Full text (versione editoriale) | NON PUBBLICO - Accesso privato/ristretto | Administrator Richiedi una copia |
| miv_Split_current.pdf | Pre print | Pre-print | PUBBLICO - Pubblico con Copyright | Open Access Visualizza/Apri |
http://hdl.handle.net/11392/2356424
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