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arXiv · 1107.2111

Modeling near-field radiative heat transfer from sharp objects using a general 3d numerical scattering technique

Alexander P. McCauley·M. T. Homer Reid·Matthias Krüger·Steven G. Johnson
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Abstract

We examine the non-equilibrium radiative heat transfer between a plate and finite cylinders and cones, making the first accurate theoretical predictions for the total heat transfer and the spatial heat flux profile for three-dimensional compact objects including corners or tips. We find qualitatively different scaling laws for conical shapes at small separations, and in contrast to a flat/slightly-curved object, a sharp cone exhibits a local \emph{minimum} in the spatially resolved heat flux directly below the tip. The method we develop, in which a scattering-theory formulation of thermal transfer is combined with a boundary-element method for computing scattering matrices, can be applied to three-dimensional objects of arbitrary shape.

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Alexander P. McCauley, M. T. Homer Reid, Matthias Krüger, Steven G. Johnson. 2011-07-11. Modeling near-field radiative heat transfer from sharp objects using a general 3d numerical scattering technique. https://doi.org/10.1103/physrevb.85.165104

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