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arXiv 1301.6592cond-mat.mes-hallcond-mat.stat-mech
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纳米尺度辐射传热的热动力学方法

A thermokinetic approach to radiative heat transfer at the nanoscale

Agustín Pérez-Madrid, Luciano C. Lapas, J. Miguel Rubí

摘要:

由于其范围和性质,纳米级的辐射热交换对几个领域提出了挑战。在这里,我们提供了一个热动力学描述的微尺度辐射能量转移,包括声子-光子耦合表现出通过非德拜弛豫行为。我们发现,对数正态分布的松弛模式占这种非德拜松弛行为导致的热导。我们还讨论了涨落耗散定理的有效性。得到的导热系数的一般表达式与已有的实验结果符合得很好,具有很高的精度。因此,我们的方法提供了一个全面的解释辐射能量转移通过微米间隙,无论几何配置和距离。

英文摘要:

Radiative heat exchange at the nanoscale presents a challenge for several areas due to its scope and nature. Here, we provide a thermokinetic description of microscale radiative energy transfer including phonon-photon coupling manifested through a non-Debye relaxation behavior. We show that a lognormal-like distribution of modes of relaxation accounts for this non-Debye relaxation behavior leading to the thermal conductance. We also discuss the validity of the fluctuation-dissipation theorem. The general expression for the thermal conductance we obtain fits existing experimental results with remarkable accuracy. Accordingly, our approach offers an overall explanation of radiative energy transfer through micrometric gaps regardless of geometrical configurations and distances.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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