QQ客服 官方微博 反馈留言

	Thermal conductivity of carbon nanotube: From ballistic to diffusive transport
	Hou Quan-Wen ; Cao Bing-Yang ; Guo Zeng-Yuan
	2010-10-12 ; 2010-10-12
关键词	carbon nanotube thermal conductivity ballistic transport low-dimensional heat conduction MOLECULAR-DYNAMICS LENGTH DEPENDENCE HEAT-CONDUCTION TEMPERATURE SIMULATION Physics, Multidisciplinary
中文摘要	Length dependence of the thermal conductivity of (5, 5) carbon nanotube at 300 K and 1000 K is studied by nonequilibrium molecular dynamics simulations. At room temperature the thermal conductivity shows linear length dependence for the tube length less than 40 nm, which shows completely ballistic transport. The calculated ballistic thermal conductance per unit area is 5.88 x 10(9) Wm(-2) K-1. The thermal conductivity increases with the increase of the nanotube length, but the increase rate decreases as the length increases. It shows that the phonon transport is in the ballistic-diffusive regime, and transits from ballistic to diffusive with increase of the tube length. The thermal conduction is close to completely diffusive transport and the ballistic transport can be ignored when the nanotube is longer than 10 mu m. In the simulations, the power exponent of the thermal conductivity of carbon nanotube to the tube length decreases by decaying exponential function as the tube length increases. Different from one-dimensional material, in the thermodynamic limit, a completely diffusive transport will dominate the thermal transport in carbon nanotubes, and the thermal conductivity will converge to a finite value.
语种	中文 ; 中文
出版者	CHINESE PHYSICAL SOC ; BEIJING ; P O BOX 603, BEIJING 100080, PEOPLES R CHINA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/78970]
专题	清华大学
推荐引用方式 GB/T 7714	Hou Quan-Wen,Cao Bing-Yang,Guo Zeng-Yuan. Thermal conductivity of carbon nanotube: From ballistic to diffusive transport[J],2010, 2010.
APA	Hou Quan-Wen,Cao Bing-Yang,&Guo Zeng-Yuan.(2010).Thermal conductivity of carbon nanotube: From ballistic to diffusive transport..
MLA	Hou Quan-Wen,et al."Thermal conductivity of carbon nanotube: From ballistic to diffusive transport".(2010).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。