Thermal rectification in coupled rotor lattices with gradient mass

分类： 物理学 >> 凝聚态:结构、力学和热性能 提交时间： 2016-06-14

Meng An J. N. Zhou F. G. Li J. W. Xiong.

摘要： Heat conduction through one-dimensional (1D) coupled rotator lattices is investigated in the presence of mass gradient. It is found that thermal current in the direction of mass increasing is not asymmetric with heat flux though mass decreasing system, which is called thermal rectification. Moreover, we find that the larger is the mass gradient, the more evident is the thermal rectification effect, which is consistent with FPU lattice with mass gradient. Based on the influences of the thermal rectification on shape parameters K and A of nearest-neighbor interactions, the average temperature of atomic chain and the system size, a optimum thermal rectifier is designed, which thermal rectification efficiency has reached 70. These investigations would contribute to controlling and manipulating thermal current.

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