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Heat transfer from nanoparticles: a corresponding state analysis.

Abstract：

: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.

journal_name

Proc Natl Acad Sci U S A

journal_title

Proceedings of the National Academy of Sciences of the United States of America

authors

Merabia S,Shenogin S,Joly L,Keblinski P,Barrat JL

doi

10.1073/pnas.0901372106

subject

Has Abstract

pub_date

2009-09-08 00:00:00

pages

15113-8

issue

36

eissn

0027-8424

issn

1091-6490

pii

0901372106

journal_volume

106

pub_type

杂志文章

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