Investigation on the aggregation structure of nanoparticle on the thermal conductivity of nanofluids by molecular dynamic simulations

被引：47

作者：

Liao, Jibang ^{[1
,2
]}

Zhang, Aimin ^{[2
]}

Qing, Shan ^{[1
,2
]}

Zhang, Xiaohui ^{[1
,2
]}

Luo, Zhumei ^{[1
,2
]}

机构：

[1] State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Yunnan, Peoples R China

[2] Kunming Univ Sci & Technol, Dept Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China

来源：

POWDER TECHNOLOGY | 2022年 / 395卷

基金：

中国国家自然科学基金;

关键词：

Nanofluids; Equilibrium molecular dynamics; Thermal conductivity; Aggregation morphology; Micro-mechanism; LIQUID-SOLID INTERFACE; CU-AR NANOFLUIDS; EQUILIBRIUM; LAYER;

D O I：

10.1016/j.powtec.2021.10.007

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this paper, equilibrium molecular dynamic simulations were used to calculate the thermal conductivity of Cu-Ar nanofluid with various initial aggregation structures at different volume fractions. The microscopic mechanism of the effect of nanoparticle agglomerate aggregation mode on the thermal conductivity of nanofluids was analyzed. Results showed that the particle size is the key factor to determine the aggregation structure of nanoparticles. The enhancement efficiency of diffusion-limited aggregation on the thermal conduc-tivity of nanofluids was found to be greater than that of reaction-limited aggregation, and the effect of different aggregation structures on the diffusion coefficient of nanofluidic systems may be one of the potential mecha-nisms affecting the thermal conductivity of nanofluids. (c) 2021 Elsevier B.V. All rights reserved.

引用

页码：584 / 591

页数：8

共 38 条

[21]

Minkowycz WJ., 2013, Nanoparicles Heat Transfer and Fluid Flow

[22] The thermal conductivity of alumina-water nanofluids from the viewpoint of micromechanics [J].

Pabst, W. ;

Gregorova, E. .

MICROFLUIDICS AND NANOFLUIDICS, 2014, 16 (1-2) :19-28

[23]

Pan Y.A., 2020, POWDER TECHNOL, V362, P501

[24] FAST PARALLEL ALGORITHMS FOR SHORT-RANGE MOLECULAR-DYNAMICS [J].

PLIMPTON, S .

JOURNAL OF COMPUTATIONAL PHYSICS, 1995, 117 (01) :1-19

[25] Effect of aggregation kinetics on the thermal conductivity of nanoscale colloidal solutions (nanofluid) [J].

Prasher, Ravi ;

Phelan, Patrick E. ;

Bhattacharya, Prajesh .

NANO LETTERS, 2006, 6 (07) :1529-1534

[26] Simulation of the thermal conductivity of a nanofluid with small particles by molecular dynamics methods [J].

Rudyak, V. Ya. ;

Krasnolutskii, S. L. .

TECHNICAL PHYSICS, 2017, 62 (10) :1456-1465

[27]

Sarkar S., 2007, J APPL PHYS, V102, P280

[28] Investigation of nanoparticle aggregation effect on thermal properties of nanofluid by a combined equilibrium and non-equilibrium molecular dynamics simulation [J].

Sedighi, Mina ;

Mohebbi, Ali .

JOURNAL OF MOLECULAR LIQUIDS, 2014, 197 :14-22

[29] Visualization and analysis of atomistic simulation data with OVITO-the Open Visualization Tool [J].

Stukowski, Alexander .

MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING, 2010, 18 (01)

[30] Forced and natural convection in aggregate-laden nanofluids [J].

Thajudeen, Thaseem ;

Hogan, Christopher J., Jr. .

JOURNAL OF NANOPARTICLE RESEARCH, 2011, 13 (12) :7099-7113

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