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

被引：23
|
作者：
Jou, D. [1 ]
Carlomagno, I. [2 ]
Cimmelli, V. A. [2 ]
机构：
[1] Univ Autonoma Barcelona, Dept Fis, Bellaterra 08193, Catalonia, Spain
[2] Univ Basilicata, Dept Math Comp Sci & Econ, I-85100 Potenza, Italy
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2015年 / 73卷
关键词：
Graded systems; Thermal waves; Phase speed; Flux of heat flux; IRREVERSIBLE THERMODYNAMICS; CONDUCTION ANALYSIS;
D O I：
10.1016/j.physe.2015.05.026
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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.
引用
收藏
页码：242 / 249
页数：8
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