Multiscale analysis of moving clusters of microcontacts

作者：Jang Yong Hoon^*; Barber J R

来源：International Journal of Heat and Mass Transfer, 2010, 53(19-20): 3817-3822.

DOI：10.1016/j.ijheatmasstransfer.2010.04.034

• Sliding contacts
• Thermal constriction resistance
• Multiscale analysis
• Peclet number
• Fractal contact

Greenwood's approximation for the thermal resistance of a cluster of microcontacts is used recursively to estimate the thermal resistance due to a fractal array of circular contact areas motivated by Archard's contact model. The results are then extended to the case of sliding contacts, using a technique due to Burton. It is found that the total resistance converges on a limit when arbitrarily large numbers of fractal scales are included, but the fine scale features in the contact area have a disproportionate effect at high Peclet number and hence reduce the proportion of frictional heating passing into the moving body.

• 出版日期2010-9