摘要
基于MD(分子动力学)对Ar-Cu纳米流体的热物性进行研究。从微观角度通过径向分布函数分析了纳米粒子体积分数对纳米流体热物性及强化流体传热的影响规律和机理。模拟结果表明:随着纳米流体中纳米粒子体积分数的增加,纳米流体微观结构由液态向固态逐渐转变,使得纳米流体热导率随之增加;由于纳米粒子比热容较小,纳米流体中纳米颗粒体积分数的增加会导致纳米流体比热容降低;热导率和比热容的改变使热扩散系数随体积分数增大逐渐增大;纳米流体中纳米颗粒体积分数的增加会导致黏度增加。
The thermophysical properties of Ar-Cu nanofluids were studied based on MD(molecular dynamics).From the microscopic point of view,the influence law and mechanism of the volume fraction of nanoparticles on the thermophysical properties of nanofluids and the enhancement of heat transfer of fluids were analyzed through the radial distribution function.The simulation results show that the microstructure of nanofluids changes gradually from liquid to solid with the increase of the volume fraction of nanoparticles in nanofluids,resulting in the increase of thermal conductivity of nanofluids.Because the specific heat capacity of nano-particles is small,the increase of the volume fraction of nano-particles in nanofluids leads to the decrease of the specific heat capacity of nanofluids.The thermal diffusion coefficient increases gradually with the increase of volume fraction as the change of thermal conductivity and specific heat capacity.The increase of volume fraction of nanoparticles in nanofluids leads to the increase of viscosity.
作者
战洪仁
范晓雷
王立鹏
王昕宇
王其标
刘东灵
ZHAN Hongren;FAN Xiaolei;WANG Lipeng;WANG Xinyu;WANG Qibiao;LIU Dongling(School of Mechanical and Power Engineering,Shenyang University of Chemical Technology,Shenyang 110142,Liaoning Province,China;School of Mechanical Engineering,Ningbo Institute of Engineering,Ningbo 315016,Zhejiang Province,China)
出处
《化学工程》
CAS
CSCD
北大核心
2023年第10期68-72,共5页
Chemical Engineering(China)
基金
国家自然科学基金资助项目(61473056)
辽宁省教育厅自然科学基金资助项目(LJ2020017)。
关键词
纳米流体
分子动力学
径向分布函数
热物性
nanofluids
molecular dynamics
radial distribution function
thermophysical properties
