Non-Fourier heat conduction study for steady states in metallic nanofilms

作     者：WANG HaiDong LIU JinHui GUO ZengYuan TAKAHASHI Koji 

作者机构：Key Laboratory for Thermal Science and Power Engineering of Ministry of EducationSchool of AerospaceTsinghua UniversityBeijing 100084China Graduate School of EngineeringKyushu UniversityFukuoka 819-0395Japan 

出 版 物：《Chinese Science Bulletin》 (Chinese Science Bulletin)

年 卷 期：2012年第57卷第24期

页      面：3239-3243页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China (51076080, 51136001, 50730006) the Tsinghua University Initiative Scientific Research Program 

主　　题：非傅立叶热传导 非稳定状态 纳米薄膜 金属 低环境温度 Fourier 傅立叶定律 高热通量 

摘      要：As a fundamental theory of heat transfer, Fourier s law is valid for most traditional conditions. Research interest in non-Fourier heat conditions is mainly focused on heat wave phenomena in non-steady states. Recently, the thermomass theory posited that, for steady states, non-Fourier heat conduction behavior could also be observed under ultra-high heat flux conditions at low ambient temperatures. Significantly, this is due to thermomass inertia. We report on heat conduction in metallic nanofilms from large currents at low temperatures; heat fluxes of more than 1×1010 W m 2 were used. The measured average temperature of the nanofilm is larger than that based on Fourier s law, with temperature differences increasing as heat flux increased and ambient temperature decreased. Experimental results for different film samples at different ambient temperatures reveal that non-Fourier behavior exists in metallic nanofilms in agreement with predictions from thermomass theory.