Molecular dynamic simulation on the thermal conductivity of nanofluids in aggregated and non-aggregated states

Lee, S.L. and Saidur, R. and Sabri, M.F.M. and Min, T.K. (2015) Molecular dynamic simulation on the thermal conductivity of nanofluids in aggregated and non-aggregated states. Numerical Heat Transfer Part a-Applications, 68 (4). pp. 432-453. ISSN 1040-7782

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Abstract

Nanofluids are engineered by suspending nanoparticles in convectional heat transfer fluids to enhance thermal conductivity. This study is aimed at identifying the role of nanoparticle aggregation in enhancing the thermal conductivity of nanofluids. Molecular dynamic simulation with the Green Kubo method was employed to compute thermal conductivity of nanofluids in aggregated and non-aggregated states. Results show that the thermal conductivity enhancement of nanofluids in an aggregated state is higher than in a non-aggregated state, by up to 35. The greater enhancement in aggregated nanofluids is attributed to both higher collision among nanoparticles and increases in the potential energy of nanoparticles.

Item Type: Article
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L. Saidur, R. Sabri, M. F. M. Min, T. K. MOHD SABRI, MOHD FAIZUL/B-9084-2010; Engineering, Faculty /I-7935-2015 MOHD SABRI, MOHD FAIZUL/0000-0001-8096-2709; Engineering, Faculty /0000-0002-4848-7052 Ministry of Higher Education Malaysia (MoHE); UM-MoHE High Impact Research Grant Scheme (HIRG) UM.C/HIR/MOHE/ENG/40 The authors would like to acknowledge the Ministry of Higher Education Malaysia (MoHE) for its financial support. This work was also supported by the UM-MoHE High Impact Research Grant Scheme (HIRG) (Project No.: UM.C/HIR/MOHE/ENG/40). 0 TAYLOR & FRANCIS INC PHILADELPHIA NUMER HEAT TR A-APPL
Uncontrolled Keywords: Liquid-solid interface, brownian-motion, nanoparticle suspensions, enhancement, model, mechanisms, water, nonequilibrium, resistance, particles,
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 09 Mar 2016 03:29
Last Modified: 09 Mar 2016 03:29
URI: http://eprints.um.edu.my/id/eprint/15739

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