THERMAL CONDUCTIVITY OF SINGLE-WALLED CARBON NANOTUBES WITH INTERNAL HEAT SOURCE STUDIED BY MOLECULAR DYNAMICS SIMULATION
Thermal conductivity of (5, 5) single-walled carbon nanotubes with internal heat source is investigated by using nonequilibrium molecular dynamics simulations. The uniform heat source and heat source-and-sink schemes are both preformed. Though the thermal conductivity with internal heat source increases with the increase of tube length as predicted by diffusive-ballistic phonon kinetics, the present results are found to be smaller than those of carbon nanotubes with fixed temperature difference or heat flux even by half in some cases. Based on the theory of phonon dynamics, a function called phonon free path distribution is defined to develop a new one-dimensional heat conduction model considering internal heat source. The model could preferably explain the diffusive-ballistic heat transport in carbon nanotubes with internal heat source.
Yuanwei Li Bingyang Cao
Department of Engineering Mechanics Tsinghua University Beijing 100084, China
国际会议
The Ninth Asian Thermophysical Properties Conference(第九届亚洲热物理性能会议 ATPC 2010)
北京
英文
313-318
2010-10-19（万方平台首次上网日期，不代表论文的发表时间）