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. CarlomagnoWriting – Original Draft Preparation
;
2015-01-01
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.File in questo prodotto:
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