一维原子链的热导模拟  

Simulation of Heat Conduction in One-dimensional Chains

作　　者：蒋城欢[1] 刘红[1] 

机构地区：[1]南京师范大学物理科学与技术学院,江苏南京210097

出　　处：《南京师大学报（自然科学版）》2006年第3期36-39,共4页Journal of Nanjing Normal University(Natural Science Edition)

基　　金：江苏省教育厅自然科学基金资助项目(04KJB140065)

摘　　要：提出新的碰撞模型,通过模拟几种只含两种质量粒子的一维链的能量传递,研究质量分布对热导的影响.得出的T-N图显示质量比在1到3之间时,链上的温度分布存在部分梯度,当质量比大于3时,链上粒子的温度分布不存在梯度,整体处于单一温度值T附近,而且平均温度仅与链上粒子的质量分布有关.A new collision model was put forward, the influence of mass distribution on the heat conduction was studied through simulating the energy, transportation in some one-dimensional chains which only have two different masses. The calculated T - N profiles show that it has gradient characteristic in the temperature distribution when the mass ratio is between 1 and 3. However, for larger mass ratio, the gradient in several chains no longer exist, and the whole chain is near a stable average temperature. Moreover, it is found that the average temperature is only relative to mass distribution.

关 键 词：一维链 双原子链 Fibonacci链 Period-doubling链 Thue-Morse链 

分 类 号：O551[理学—热学与物质分子运动论]