Cao B-Y, Di Domenico M, Nie B-D, Sellitto A
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, People's Republic of China.
Department of Mathematics, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy.
Proc Math Phys Eng Sci. 2019 Jan;475(2221):20180499. doi: 10.1098/rspa.2018.0499. Epub 2019 Jan 30.
A theoretical model to describe heat transport in functionally graded nanomaterials is developed in the framework of extended thermodynamics. The heat-transport equation used in our theoretical model is of the Maxwell-Cattaneo type. We study the propagation of acceleration waves in functionally graded materials (FGMs). In the special case of functionally graded Si Ge thin layers, we point out the influence of the composition gradient on the propagation of heat pulses. A possible use of heat pulses as exploring tool to infer the inner composition of FGMs is suggested.
在扩展热力学框架下，建立了一个描述功能梯度纳米材料中热传输的理论模型。我们理论模型中使用的热传输方程是麦克斯韦 - 卡塔尼奥型的。我们研究了功能梯度材料（FGMs）中加速度波的传播。在功能梯度硅锗薄层的特殊情况下，我们指出了成分梯度对热脉冲传播的影响。提出了将热脉冲用作推断功能梯度材料内部成分的探测工具的一种可能用途。
