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Research Papers: Micro/Nanoscale Heat Transfer

Heat Transfer Across Nanoparticle–Liquid Interfaces

[+] Author and Article Information
Anjan R. Nair

Assistant Professor
Department of Mechanical Engineering,
College of Engineering Trivandrum,
Kerala 695016, India

Sarith P. Sathian

Associate Professor
Department of Applied Mechanics,
IIT Madras,
Chennai 600036, India
e-mail: sarith@iitm.ac.in

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received February 11, 2015; final manuscript received June 1, 2016; published online July 19, 2016. Assoc. Editor: Alan McGaughey.

J. Heat Transfer 138(11), 112402 (Jul 19, 2016) (6 pages) Paper No: HT-15-1112; doi: 10.1115/1.4033954 History: Received February 11, 2015; Revised June 01, 2016

A better understanding of submicron-scale heat transfer is rapidly gaining interest due to the complex phenomena involved in nanometer scales. We discuss the role of interfacial resistance, in particular that of curvature effects, and the possibility of achieving high temperatures inside the particles without creating a phase transition in the surrounding fluid. The heat transfer from a heated nanoparticle into surrounding fluid is studied using molecular dynamics (MD) simulations. The results show that the particle size and wetting strength between the nanoparticle–liquid influence the heat transfer characteristics. The interfacial conductance and Kapitza length for a model solid–liquid interface were calculated. Both quantities are found to be strongly dependent on particle size and temperature. Smaller nanoparticles are observed to have a stronger bonding with the interfacial fluid when the temperature of the particle is higher, while larger nanoparticles have better affinity with the liquid at lower temperatures.

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References

Figures

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Fig. 1

Nanoparticle–fluid system

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Fig. 2

Temperature profiles across the nanoparticle interface–particle size

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Fig. 3

Interfacial conductance as a function of particle size and temperature

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Fig. 4

Interfacial conductance as a function of solid–liquid interfacial tension

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Fig. 5

Variation of solid–liquid interfacial tension with particle size

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Fig. 6

Kapitza length as a function of particle size (lK is in molecular dimension)

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Fig. 7

Temperature field across the liquid–nanoparticle interface, obtained with MD

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Fig. 8

Steady-state density profiles for nanoparticle–liquid model system for three interaction strengths (c = 0.5, 1, and 1.5)

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Fig. 9

Nanoparticle–fluid interface for c = 0.5

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