【摘要】 用Boltzmann传输方程建立灰介电薄膜声子辐射传热方程,提出灰体介电薄膜的当量导热系数的概念,指出Fourier定律只适用于声学极厚区域,给出了用Fourier定律进行热流密度计算的误差.更多还原

【Abstract】 The equation of phonon radiative transfer (EPRT) is deduced based on the Boltzmann transport equation (BTE). The concept of effective conductivity of gray dielectric thin film is introduced. It is pointed out that the Fourier law is valid only in the acoustic thick regions. The error of the heat flux predicted by the Fourier law is presented.更多还原