Modeling near-field radiative heat transfer from sharp objects using a general 3d numerical scattering technique
| Autor: | McCauley, Alexander P., Reid, M. T. Homer, Krüger, Matthias, Johnson, Steven G. |
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| Rok vydání: | 2011 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.85.165104 |
| Popis: | 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. Comment: 5 pages, 4 figures. Corrected background information in the introduction, results and discussion unchanged |
| Databáze: | arXiv |
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