Thermon gas as the thermal energy carrier in gas and metals

作     者：WANG HaiDong GUO ZengYuan 

作者机构：Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Engineering Mechanics Tsinghua Univer-sity Beijing 100084 China 

出 版 物：《Chinese Science Bulletin》 (中国科学通报)

年 卷 期：2010年第55卷第29期

页      面：3350-3355页

核心收录：

学科分类：07[理学] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

主　　题：金属材料 能源载体 天然气 热传导规律 气体分子 空气动力学原理 傅里叶定律 等效质量 

摘      要：The thermon gas may be seen as the main thermal-energy carrier in heat *** phonons,which are defined as the energy quanta for quantized lattice vibrationss,and the phonon gas,which consists of a large number of randomly moving *** the same way,a thermon in gas and metal is defined as the equivalent mass of thermal energy of a gas molecule or an electron,respectively,and the thermon gas consists of a large number of randomly moving *** the phonon and the photon,the rest mass of a thermon is *** the mass of a moving thermon changes continuously,the thermon may be regarded as a nonquantized ***,heat flux can be seen as the directional flow of the thermon gas due to a given temperature *** thermon mass is mh=E/c2,where E is the thermal energy and c is the speed of light,and the thermon gas is actually a compressible gas flow with real *** to the principle of aerodynamics,the state equations of a thermon gas in either gas or metal are obtained by different statistical ***,Newtonian mechanics may be applied to obtain the momentum-conservation equation of a thermon gas,which is actually the general heat-conduction law,and which reduces to Fourier s law when thermal inertia is *** general heat-conduction law is a damped wave equation that can be used to quantitatively investigate thermal wave phenomena caused by heating of thin metal films by ultrafast laser *** numerical solution of the general heat-conduction law is obtained using a finite-difference method with double precision,and the results show that the thermal wave increases as the spatial inertia of the thermon gas increases.