Heat transfer from nanoparticles: a corresponding state analysis.
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 by 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 (LJ) interactions captures the essential features of such experiments and that the results for various liquids can be mapped onto the LJ 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.
Merabia
Samy
S
Laboratoire de Physique de la Matière Condensée et des Nanostructures, Centre Nationale de la Recherche Scientifique, Unité Mixte de Recherche 5586, Université de Lyon, 43 Boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex, France.
Shenogin
Sergei
S
Joly
Laurent
L
Keblinski
Pawel
P
Barrat
Jean-Louis
JL
D006046:Gold / Q000737:chemistry; D006358:Hot Temperature; D008956:Models, Chemical; D053758:Nanoparticles / Q000737:chemistry*; D009795:Octanes / Q000737:chemistry; D013816:Thermodynamics; D014867:Water / Q000737:chemistry
D009795:Octanes; D014867:Water; D006046:Gold; C026728:octane