Počet záznamů: 1
Derivation of the phase field equations from the thermodynamic extremal principle
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SYSNO ASEP 0369694 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Derivation of the phase field equations from the thermodynamic extremal principle Tvůrce(i) Svoboda, Jiří (UFM-A) RID, ORCID
Fischer, F. D. (AT)
McDowell, D.L. (US)Celkový počet autorů 3 Zdroj.dok. Acta Materialia. - : Elsevier - ISSN 1359-6454
Roč. 60, č. 1 (2012), s. 396-406Poč.str. 11 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova Phase-field method ; Phase transformation ; Thermodynamic extremal principle Vědní obor RIV BJ - Termodynamika CEP GAP108/10/1781 GA ČR - Grantová agentura ČR CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000297822300039 DOI 10.1016/j.actamat.2011.09.044 Anotace Thermodynamics employs quantities that characterize the state of the system and provides driving forces for system evolution. These quantities can be applied by means of the thermodynamic extremal principle to obtain models and consequently constitutive equations for the evolution of the thermodynamic systems. The phase field method is a promising tool for simulation of the microstructure evolution in complex systems but introduces several parameters that are not standard in thermodynamics. The purpose of this paper is to show how the phase field method equations can be derived from the thermodynamic extremal principle, allowing the common treatment of the phase field parameters together with standard thermodynamic parameters in future applications. Fixed values of the phase field parameters may, however, not guarantee fixed values of thermodynamic parameters. Conditions are determined, for which relatively stable values of the thermodynamic parameters are guaranteed during phase field method simulations of interface migration. Finally, analytical relations between the thermodynamic and phase field parameters are found and verified for these simulations. A slight dependence of the thermodynamic parameters on the driving force is determined for the cases examined. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2012
Počet záznamů: 1