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Extended Irreversible Thermodynamics and Generalization of the Dual-Phase-Lag Model in Heat Transfer

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Veröffentlicht/Copyright: 1. Juni 2005
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Journal of Non-Equilibrium Thermodynamics
Aus der Zeitschrift Band 28 Heft 3

Abstract

The process of heat conduction, with allowance made for the lag effect, is considered. A postulate of extended irreversible thermodynamics is suggested, according to which the entropy is a function of the internal energy and its time derivatives (up to the third derivative, inclusive). On the basis of the developed thermodynamic formalism, a third-order heat conduction equation is derived, generalizing the known dual-phase-lag model equation. A mathematical model of heat conduction in a package of heat-conducting plates is built, leading to the considered third-order equation. By numerical modeling it is shown that this equation describes heat wave propagation.

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Published Online: 2005-06-01
Published in Print: 2003-07-21

Copyright © 2003 by Walter de Gruyter GmbH & Co. KG

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