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热质的运动和传递-热子气的守恒方程和傅立叶定律
引用本文:过增元,朱宏晔.热质的运动和传递-热子气的守恒方程和傅立叶定律[J].工程热物理学报,2007,28(1):86-88.
作者姓名:过增元  朱宏晔
作者单位:清华大学工程力学系传热与能源利用北京市重点实验室,北京,100084
摘    要:本文在热质和热子气概念的基础上建立了热子气的质量、动量、能量守恒方程.基于傅立叶导热定律求得了热子气粘性系数和粘性力的近似表达式.分析了傅立叶定律的物理意义:傅立叶定律是在忽略惯性力的条件下对热子气动量方程的近似.在极低温度或极高热流密度条件下傅立叶定律不再适用.

关 键 词:热质  热子气  傅立叶定律
文章编号:0253-231X(2007)01-0086-03
修稿时间:2006年1月23日

MOTION AND TRANSFER OF THERMAL MASS——CONSERVATION EQUATIONS OF THERMON GAS AND FOURIER'S LAW
GUO Zeng-Yuan,ZHU Hong-Ye.MOTION AND TRANSFER OF THERMAL MASS——CONSERVATION EQUATIONS OF THERMON GAS AND FOURIER''''S LAW[J].Journal of Engineering Thermophysics,2007,28(1):86-88.
Authors:GUO Zeng-Yuan  ZHU Hong-Ye
Abstract:Based on the concepts of thermal mass and thermon gas the conservation equations of thermon gas including mass, momentum and energy conservation equation were derived in this paper. From Fourier's law the viscosity coefficient of thermon gas was obtained. The analyses show that Fourier's law is the simplified momentum conservation equation of thermon gas with ignoring the inertia of thermon gas. Fourier's law is no longer applicable in the problems with extreme low temperature or extreme high heat current density.
Keywords:thermal mass  thermon gas  fourier's law
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