Influence of roughness on near-field heat transfer between two plates

Details Influence of roughness on near-field heat transfer between two plates Influence of roughness on near-field heat transfer between two plates

2011-03-11

arxiv.org/abs/1103.2367v1

Phys. Rev. B 82, 245410 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

The surface roughness correction to the near-field heat transfer between two rough bulk materials is discussed by using second-order perturbation theory. The results allow for estimating the impact of surface roughness to the heat transfer in recent experiments between two plates and between a microsphere and a plate (using the Derjaguin approximation). Furthermore, we show that the proximity approximation for describing rough surfaces is valid for distances much smaller than the correlation length of the surface roughness even if the heat transfer is dominated by the coupling of surface modes.

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