标题： 考虑近场热辐射效应的热接触电阻重新估计 显示英文标题

标题： Re-estimation of thermal contact resistance considering near-field thermal radiation effect

摘要： 热接触在许多工程领域一直是热门问题，热接触电阻（TCR）是衡量界面间传热效率的重要指标之一。 在本文中，考虑到接触区和非接触区的传热，对符合性粗糙表面的接触传热进行了理论重新估算。 采用涨落电动力学（第一性原理计算）来计算热辐射。 接触区的贡献通过CMY TCR模型进行估算，并通过具有相应表面粗糙度功率谱（PSD）的特定表面建模进一步研究。 给出了几个测试案例，其中主要在模拟中使用了铝和非晶氧化铝。 研究表明，在有效粗糙度的一定范围内，界面处的热传导和近场热辐射之间存在显著的协同作用。 当有效粗糙度接近亚微米尺度时，即使在室温下也不应忽略近场辐射效应。 显示英文摘要

摘要： Thermal contact has always been a hot issue in many engineering fields and thermal contact resistance (TCR) is one of the important indicators weighing the heat transfer efficiency among the interfaces. In this paper, the contact heat transfer of conforming rough surfaces is theoretically re-estimated considering both the heat transfer from contact and non-contact regions. The fluctuational electrodynamics (an ab initio calculation) is adopted to calculate the thermal radiation. The contribution of contact regions is estimated by the CMY TCR model and further studied by modelling specific surfaces with corresponding surface roughness power spectrum (PSD). Several tests are presented where aluminum and amorphous alumina are mainly used in the simulations. Studies showed that there exists a significant synergy between the thermal conduction and near-field thermal radiation at the interface in a certain range of effective roughness. When the effective roughness is near to the scales of submicron, the near-field radiation effect should not be neglected even at room temperature.