Volokitin A I, Lorenz B, Persson B N J
IFF, FZ-Jülich, Germany.
Eur Phys J E Soft Matter. 2010 Jan;31(1):3-24. doi: 10.1140/epje/i2010-10543-1.
We study the heat transfer between elastic solids with randomly rough surfaces.We include both the heat transfer from the area of real contact, and the heat transfer between the surfaces in the non-contact regions.We apply a recently developed contact mechanics theory, which accounts for the hierarchical nature of the contact between solids with roughness on many different length scales. For elastic contact, at the highest (atomic) resolution the area of real contact typically consists of atomic (nanometer) sized regions, and we discuss the implications of this for the heat transfer. For solids with very smooth surfaces, as is typical in many modern engineering applications, the interfacial separation in the non-contact regions will be very small, and for this case we show the importance of the radiative heat transfer associated with the evanescent electromagnetic waves which exist outside of all bodies.
我们研究具有随机粗糙表面的弹性固体之间的热传递。我们既考虑了来自实际接触区域的热传递，也考虑了非接触区域表面之间的热传递。我们应用了最近发展的接触力学理论，该理论考虑了具有许多不同长度尺度粗糙度的固体之间接触的层次性质。对于弹性接触，在最高（原子）分辨率下，实际接触面积通常由原子（纳米）尺寸的区域组成，我们讨论了这对热传递的影响。对于许多现代工程应用中典型的具有非常光滑表面的固体，非接触区域的界面间距将非常小，对于这种情况，我们展示了与存在于所有物体之外的倏逝电磁波相关的辐射热传递的重要性。
