The coupling between conduction and radiative heat transfer in the near-field regime between two coaxial cylinders separated by a vacuum gap is analyzed. It is found that there is a flux saturation mechanism for radiative transfer even without a non-local effect. For polar materials, this saturation occurs at separation distances in the range of 1-10 nm, which can be experimentally explored.
We analyze the coupling between conduction and radiative heat transfer in the near-field regime between two coaxial cylinders separated by a vacuum gap. By solving the heat transport equation in the steady-state regime between metals or polar materials, we highlight a flux saturation mechanism for the radiative transfer even without a non-local effect. In the case of polar materials, this saturation occurs in the separation distances in the range of 1-10 nm, which can be experimentally explored. Published under an exclusive license by AIP Publishing.
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