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First Thermal and Fluids Engineering Summer Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

EXTENDED ABSTRACT: MOLECULAR DYNAMICS STUDY OF THE THERMAL CONDUCTIVITY OF A HEXAGONAL BORON NITRIDE-WATER NANOFLUID

DOI: 10.1615/TFESC1.mnc.012823
pages 1631-1634

Tolga Akiner
Bogazici University, Department of Mechanical Engineering, Bebek, Istanbul 34342, Turkey

Jeremy K. Mason
Bogazici University, Department of Mechanical Engineering, Bebek, Istanbul 34342, Turkey

Hakan Erturk
Department of Mechanical Engineering Boğaziçi University, Istanbul; and Department of Mechanical Engineering, Middle East Technical University, Ankara 06531, Turkey; Intel Corporation, Chandler, AZ 85226


KEY WORDS: molecular dynamics, nanofluid, hexagonal boron nitride, thermal conductivity

Abstract

Nanofluids are a recently-developed class of fluids whose enhanced thermal properties make them promising for many engineering applications. The rational design of nanofluids is made more difficult though by continuing controversy about the physical mechanisms underlying the observed enhancement. This may be resolved by the use of molecular dynamics simulations to directly examine the intermolecular interactions leading to the relevant mechanisms. This study specifically investigates the prediction of thermal conductivity of water based nanofluids containing hexagonal boron nitride (hBN) nanoparticles, with the eventual goal of finding the optimal nanoparticle volume fraction for hBN nanofluids. Experimental values of the thermal conductivity are compared with values estimated by non-equilibrium molecular dynamics (NEMD) methods. The contributions of various heat transfer mechanisms, including Brownian motion of the nanoparticles and nanolayering effects, are also evaluated to identify their relative importance. This study may be the first molecular dynamics study to investigate the thermal properties of water-multilayer hBN nanofluid models in the literature.

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