纳米通道内传热过程的分子动力学研究  

Heat transport in a nanochannel by molecular dynamics study

作　　者：寇志海[1] 李广超[1] 徐让书[1] 牛玲[1] 刘宇[1] 白敏丽[2] 

机构地区：[1]沈阳航空航天大学辽宁省航空推进系统先进测试技术重点实验室,沈阳110136 [2]大连理工大学能源与动力学院,大连116024

出　　处：《低温工程》2014年第3期41-46,共6页Cryogenics

基　　金：国家自然科学基金资助项目(No.51206115)

摘　　要：对纳米尺度通道内的热量传递过程进行三维非平衡分子动力学模拟,引入嵌入式原子方法模拟固壁原子之间的相互作用势能,利用Green-Kubo公式计算导热系数和热流量。结果表明,由于固壁原子的强烈吸引作用使通道内的流体分子不再均匀变化,紧靠固壁表面的液体原子形成了相对稳定的"准固体"结构。纳米尺度下,粘性摩擦加热的效果相当明显。The three-dimensional non-equilibrium molecular dynamics simulations were performed for the thermal transport in a nanochannel. The solid-solid interactions were modeled by the embedded atom method. The heat flux through the solid-liquid interface was calculated by Green-Kubo method. It is found that there exist the relatively immobile solid-like layers adjacent to each solid wall surface due to being intensively attracted by solid atoms. Viscous heating has a pronounced effect on heat transport in a nanochannel.

关 键 词：制冷与低温工程 纳米通道 分子动力学模拟 能量输运 

分 类 号：TB61[一般工业技术—制冷工程] TB69