纳米颗粒影响沸腾换热特性的分子动力学模拟  

Molecular Dynamics Simulation on the Effect of Nanoparticles on the Heat Transfer Characteristics of Pool Boiling

作　　者：尹训彦 白敏丽[1] 胡成志[1] 吕继组[1] 高栋栋 王鹏[2] YIN Xun-Yan;BAI Min-Li;HU Cheng-Zhi;LU Ji-Zu;GAO Dong-Dong;WANG Peng(School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China;School of Civil Engineering, Dalian University of Technology, Dalian 116024, China)

机构地区：[1]大连理工大学能源与动力学院,大连116024 [2]大连理工大学土木工程学院,大连116024

出　　处：《工程热物理学报》2018年第5期1112-1117,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51476019;No.51376002;No.51276031);基金项目(No.2016M590221);大连理工大学基本科研业务费(No.DUT15RC(3)109)

摘　　要：本文采用分子动力学方法对纳米流体在金属表面的沸腾现象进行研究,揭示纳米流体的沸腾换热机制。模拟系统分为蒸汽氩、液体氩、固体铜板和铜纳米颗粒四部分。着重探讨了近壁区的纳米颗粒对沸腾换热的影响。在高过热度和低过热度两种加热情况下,探讨纳米流体和基础流体的沸腾现象。结果表明纳米颗粒的添加对沸腾过程有显著的影响:氩的温度、系统净蒸发率显著提高。近壁区的纳米颗粒做无规则运动并且不随流体运动。颗粒的尺寸及过热度对强化效果有显著影响。The pool boiling of nanofluids on the metal surface was investigated by molecular dynamics simulations to reveal the mechanisms responsible for the favorable heat transfer properties of nanofluids. The simulated system was consisted by four regions： vapor argon, liquid argon, solid copper and nanoparticles copper. Particularly, the nanoparticles were placed near the metal surface.Two superheated temperatures were considered. The results showed that the fluid temperature and net evaporation rate were increased by the addition of nanoparticles. The nanoparticles had random movement and did not move with the fluid. It was also observed that the nanoparticles size and the superheated temperature had significant effect on the enhancement effects.

关 键 词：纳米颗粒 池内沸腾 分子动力学 

分 类 号：TK124[动力工程及工程热物理—工程热物理]