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.
Heat Transfer Across Nanoparticle–Liquid Interfaces
Department of Mechanical Engineering,
College of Engineering Trivandrum,
Kerala 695016, India
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.
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Nair, A. R., and Sathian, S. P. (July 19, 2016). "Heat Transfer Across Nanoparticle–Liquid Interfaces." ASME. J. Heat Transfer. November 2016; 138(11): 112402. https://doi.org/10.1115/1.4033954
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