一维双原子理想气体中的能量扩散  

Energy diffusion in one-dimensional diatomic ideal gas

作　　者：金涛[1] 仲小亚 

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西西安710119

出　　处：《西安邮电大学学报》2017年第3期99-104,共6页Journal of Xi’an University of Posts and Telecommunications

基　　金：国家自然科学基金资助项目(11147020);中央高校基本科研业务费专项资金资助项目(GK201102028)

摘　　要：研究一维双原子理想气体在平衡态下的能量扩散。利用系统演化方程的线性特征,通过数值模拟的方法直接追踪能量在实空间的传播过程。当两种原子的质量差别较大时,能量传播表现为超扩散;当质量趋于相同时,不可积的双原子理想气体逐渐逼近可积的单原子理想气体,其能量传播在初始阶段表现为弹道扩散,在长时间尺度上表现为正常扩散。The energy diffusion in one-dimensional diatomic ideal gas at equilibrium state is numerically studied. can be traced directl By means of numerical simulation, the propagation of energy in real space y by using the linear characteristic of the evolution equation. It is found that in such system the energy diffusion depends on mass ratio of the two type model. When the mass difference of the two kinds of atoms is large, the energy pro the mass tends to be the same, the non integrable diatomic pa id gation is the super diffusion, when eal gas is gradually approaching to the integrable monatomic ideal gas, and its energy spread in the initial stage is the ballistic diffusion, and it shows normal diffusion on a long time scale.

关 键 词：反常热传导 能量扩散 一维双原子理想气体 

分 类 号：O414.2[理学—理论物理]