Galenko, Peter (2010) Diffuse-interface model for fast phase transitions. The 8th AIMS Conference on Dynamical Systems, Differential Equations and Applications, 2010-05-25 - 2010-05-28, Dresden.
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Kurzfassung
A thermodynamic approach to fast phase transitions within a diffuse interface in a binary system is presented. Assuming an extended set of independent thermodynamic variables formed by the union of the classic set of slow variables and the space of fast variables, we introduce finiteness of the heat and solute diffusive propagation at the finite speed of the interface advancing. To describe the transition within the diffuse interface, we use the phase-field model which allows us to follow the steep but smooth change of phases within the width of diffuse interface. The governing equations of the phase-field model are derived for the hyperbolic model, model with memory, and for a model of nonlinear evolution of transition within the diffuse-interface. The consistency of the model is proved by the condition of positive entropy production and by the outcomes of the fluctuation-dissipation theorem. A comparison with the existing sharp-interface and diffuse-interface versions of the model is given together with examples.
elib-URL des Eintrags: | https://elib.dlr.de/64232/ | ||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||
Zusätzliche Informationen: | Eingeladener Vortrag Symposium: Interface Problems The 8th AIMS Conference on Dynamical Systems, Differential Equations and Applications, TU Dresden 2010 | ||||||||
Titel: | Diffuse-interface model for fast phase transitions | ||||||||
Autoren: |
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Datum: | 24 Mai 2010 | ||||||||
Open Access: | Nein | ||||||||
Gold Open Access: | Nein | ||||||||
In SCOPUS: | Nein | ||||||||
In ISI Web of Science: | Nein | ||||||||
Status: | veröffentlicht | ||||||||
Stichwörter: | Diffuse interface theory | ||||||||
Veranstaltungstitel: | The 8th AIMS Conference on Dynamical Systems, Differential Equations and Applications | ||||||||
Veranstaltungsort: | Dresden | ||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||
Veranstaltungsbeginn: | 25 Mai 2010 | ||||||||
Veranstaltungsende: | 28 Mai 2010 | ||||||||
Veranstalter : | Technische Universität Dresden | ||||||||
HGF - Forschungsbereich: | Verkehr und Weltraum (alt) | ||||||||
HGF - Programm: | Weltraum (alt) | ||||||||
HGF - Programmthema: | W FR - Forschung unter Weltraumbedingungen (alt) | ||||||||
DLR - Schwerpunkt: | Weltraum | ||||||||
DLR - Forschungsgebiet: | W FR - Forschung unter Weltraumbedingungen | ||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | W - Vorhaben Materialwissenschaftliche Forschung (alt) | ||||||||
Standort: | Köln-Porz | ||||||||
Institute & Einrichtungen: | Institut für Materialphysik im Weltraum | ||||||||
Hinterlegt von: | Herlach, Dieter | ||||||||
Hinterlegt am: | 18 Jun 2010 08:24 | ||||||||
Letzte Änderung: | 24 Apr 2024 19:29 |
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