Study on thermal conductive enhancement mechanism of nanofluid based on anti-disturbance non-equilibrium molecular dynamics

CHEN Juhui; HAN Kun; WANG Shuai; LI Mingkun; CHEN Jiyuan; MA Ming

doi:10.11949/j.issn.0438-1157.20181095

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Study on thermal conductive enhancement mechanism of nanofluid based on anti-disturbance non-equilibrium molecular dynamics

Fluid dynamics and transport phenomena | 更新时间：2026-07-24

- Study on thermal conductive enhancement mechanism of nanofluid based on anti-disturbance non-equilibrium molecular dynamics
- CIESC Journal Vol. 70, Issue 6, Pages: 2147-2152(2019)
- 作者机构：
  
  1.哈尔滨理工大学机械动力工程学院，黑龙江哈尔滨 150070
  2.哈尔滨工业大学能源科学与工程学院，黑龙江哈尔滨 150001
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20181095
  CLC： TK 124
- Received：27 September 2018，
  
  Revised：2019-03-21，
  
  Online First：15 June 2020，
  
  Published：05 June 2019
- 稿件说明：
移动端阅览
陈巨辉, 韩坤, 王帅, 李铭坤, 陈纪元, 马明. 基于反扰动非平衡分子动力学的纳米流体导热增强机理研究[J]. 化工学报, 2019, 70(6): 2147-2152

CHEN Juhui, HAN Kun, WANG Shuai, LI Mingkun, CHEN Jiyuan, MA Ming. Study on thermal conductive enhancement mechanism of nanofluid based on anti-disturbance non-equilibrium molecular dynamics[J]. CIESC Journal, 2019, 70(6): 2147-2152
陈巨辉, 韩坤, 王帅, 李铭坤, 陈纪元, 马明. 基于反扰动非平衡分子动力学的纳米流体导热增强机理研究[J]. 化工学报, 2019, 70(6): 2147-2152 DOI： 10.11949/j.issn.0438-1157.20181095.

CHEN Juhui, HAN Kun, WANG Shuai, LI Mingkun, CHEN Jiyuan, MA Ming. Study on thermal conductive enhancement mechanism of nanofluid based on anti-disturbance non-equilibrium molecular dynamics[J]. CIESC Journal, 2019, 70(6): 2147-2152 DOI： 10.11949/j.issn.0438-1157.20181095.

摘要

相较于水、乙二醇等常规流体，纳米流体出色的传热效果使其成为近十年来研究的热点之一。利用一种反扰动非平衡分子动力学方法对纳米流体的导热增强机理进行了模拟研究。在基液Ar 中加入 Cu 纳米颗粒后

纳米流体的热通量和热导率均发生了不同程度的改变，纳米颗粒体积分数的变化，在一定程度上改变了纳米流体内部的能量传递过程。进一步分析了纳米流体热导率强化的微观作用机理，发现纳米颗粒的加入，使得纳米流体的微观结构具有了类似晶体的微观结构特性，在颗粒尺寸较小的情况下，流体内部受温度梯度作用效应明显。

Abstract

Compared with conventional fluids such as water and ethylene glycol

the excellent heat transfer effect of nanofluids has made it one of the hotspots of research in the past decade. In this paper

the heat conduction enhancement mechanism of nanofluids is simulated by a reverse non equilibrium molecular dynamics method. The heat flux density and thermal conductivity of nanofluids change with the addition of Cu nanoparticles in Ar

and the volume fraction of nanoparticles changes the energy transfer process in nanofluids to a certain extent. Furthermore

the microscopic mechanism of the enhancement of thermal conductivity of nanofluids is analyzed. It was found that the addition of nanoparticles made the microstructure of nanofluids similar to that of crystals. Under the condition of smaller particle size

the effect of temperature gradient on the fluid is obvious.

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references

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