Heat transfer from nanoparticles: a corresponding state analysis

Samy Merabia (1) , Serguei Shenogin (2) , Laurent Joly (1) , Pawel Keblinski (2) , J.-L. Barrat (1)

1 LPMCN - Laboratoire de Physique de la Matière Condensée et Nanostructures
2 Materials Science and Engineering Department

In this contribution, we study situations in which nanoparticles in a fluid are strongly heated, generating high heat fluxes. This situation is relevant to experiments in which a fluid is locally heated using selective absorption of radiation by solid particles. We first study this situation for different types of molecular interactions, using models for gold particles suspended in octane and in water. As already reported in experiments, very high heat fluxes and temperature elevations (leading eventually to particle destruction) can be observed in such situations. We show that a very simple modeling based on Lennard-Jones interactions captures the essential features of such experiments, and that the results for various liquids can be mapped onto the Lennard-Jones case, provided a physically justified (corresponding state) choice of parameters is made. Physically, the possibility of sustaining very high heat fluxes is related to the strong curvature of the interface that inhibits the formation of an insulating vapor film.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Samy Merabia, Serguei Shenogin, Laurent Joly, Pawel Keblinski, J.-L. Barrat. Heat transfer from nanoparticles: a corresponding state analysis. Proceedings of the National Academy of Sciences of the United States of America, 2009, 106, pp.15113. ⟨10.1073/pnas.0901372106⟩. ⟨hal-00390390⟩