We study the effects of a composition gradient and of a non-vanishing heat flux on the phase velocity of thermal waves along a graded system. We take into account non-local and non-linear effects by applying a generalized heat transport equation. We compare the results for high-frequency and low-frequency waves. For low frequency, we discuss the conditions in which thermal waves may propagate in SixGe1-x and (Bi1-xSbx)(2)Te-3 systems. For high frequency, we discuss the influence of the relaxation of the flux of the heat flux on the heat wave propagation. (C) 2015 Elsevier B.V. All rights reserved.

A thermodynamic model for heat transport and thermal wave propagation in graded systems

I. Carlomagno
Writing – Original Draft Preparation
;
2015

Abstract

We study the effects of a composition gradient and of a non-vanishing heat flux on the phase velocity of thermal waves along a graded system. We take into account non-local and non-linear effects by applying a generalized heat transport equation. We compare the results for high-frequency and low-frequency waves. For low frequency, we discuss the conditions in which thermal waves may propagate in SixGe1-x and (Bi1-xSbx)(2)Te-3 systems. For high frequency, we discuss the influence of the relaxation of the flux of the heat flux on the heat wave propagation. (C) 2015 Elsevier B.V. All rights reserved.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/4806994
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