Physics – Condensed Matter – Materials Science
Scientific paper
2009-06-02
Proceeding of the national academy of sciences 106 (2009) 15113
Physics
Condensed Matter
Materials Science
Scientific paper
10.1073/pnas.0901372106
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.
Barrat Jean Louis
Joly Laurent
Keblinski Pawel
Merabia Samy
Shenogin Serguei
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