Influence of nanoparticle properties on the thermal conductivity of nanofluids by molecular dynamics simulation

被引：60
|
作者：
Cui, Wenzheng [1 ,2 ]
Shen, Zhaojie [1 ]
Yang, Jianguo [1 ]
Wu, Shaohua [2 ]
Bai, Minli [3 ]
机构：
[1] Harbin Inst Technol, Sch Automot Engn, Weihai, Peoples R China
[2] Harbin Inst Technol, Sch Energy Sci & Engn, Harbin 150006, Peoples R China
[3] Harbin Inst Technol, Sch Energy & Power Engn, Harbin 150006, Peoples R China
来源：
RSC ADVANCES | 2014年 / 4卷 / 98期
基金：
中国博士后科学基金;
关键词：
LIQUID-SOLID INTERFACE; ENHANCEMENT; MECHANISMS; TRANSPORT; EQUATIONS; MOTION; MODEL;
D O I：
10.1039/c4ra07736a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The properties of nanoparticles (including shape, size, material, and volume concentration) may significantly influence the thermal properties of nanofluids. Through molecular dynamics simulations, the aim of this study is to investigate the influence of nanoparticle properties on the thermal conductivity of nanofluids and find an effective criterion for predicting thermal conductivity enhancement. By establishing a series of simulation models, thermal conductivities of nanofluids were calculated on the basis of the Green-Kubo formula. It was found that all the nanoparticle properties that have been considered in this work influence the thermal conductivity of nanofluids, and the influence rules were discussed. Furthermore, there is a positive correlation between the distribution of atomic potential energy and the thermal conductivity of nanofluids. Therefore, the ratio of energetic atoms in nanoparticles is proposed to be the criterion for predicting enhancement of the apparent thermal conductivity of nanofluids.
引用
收藏
页码：55580 / 55589
页数：10
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