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

作　　者：WANG HaiDong LIU JinHui GUO ZengYuan TAKAHASHI Koji 

机构地区：[1]Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,School of Aerospace,Tsinghua University,Beijing 100084,China [2]Graduate School of Engineering,Kyushu University,Fukuoka 819-0395,Japan

出　　处：《Chinese Science Bulletin》2012年第24期3239-3243,共5页

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

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.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 cur- rents at low temperatures; heat fluxes of more than lxl01~ 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 ex- ists in metallic nanofilms in agreement with predictions from thermomass theory.

关 键 词：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 

分 类 号：TB383.2[一般工业技术—材料科学与工程]