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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

NEAR-FIELD RADIATIVE THERMAL CONDUCTIVITY OF NANOPARTICLE CHAINS

Get access (open in a dialog) DOI: 10.1615/IHTC16.rti.023143
pages 8313-8319

Sinopsis

Near-field radiative heat transfer among collections of nanoparticles has gained attention over the last several years due to their ability to support interesting many-body effects including heat superdiffusion and thermal transport by propagating surface waves. They also have been investigated experimentally as low-resistance thermal interface materials. Two primary methods of analyzing the radiation among particles have arisen: the coupled dipole method and a dispersion-based analysis of propagating surface modes. However, these two methods have not been compared to investigate their agreement or validity. In this paper, we calculate the radiative thermal conductivity of chains of SiC nanoparticles using both methods. We find that propagating surface waves do contribute substantially to thermal transport, but they alone are insufficient to predict the total thermal conductivity. The coupled dipole method, or another approach that accounts for all particle-to-particle radiative effects, must be used to estimate total heat transfer among collections of nanoparticles. Additionally, we find that a propagating wave analysis may overpredict contributions to thermal conductivity at high and low frequencies, where propagation lengths are low. This work should help to guide future studies of near-field thermal radiation among collections of nanostructures.