Abstract We investigate the persistence of micro-contacts between two elastic random rough surfaces by means a simple model for quasi-static sliding. Contact clusters are calculated with Boundary Element Method, then repeatedly displaced to study evolution original contact area. While real area remains constant due rejuvenation micro-contacts, progressively erased and replaced new ones. find an...

Correlations between the properties of a rough surface and their associated drag are very useful tool in engineering. Here, we assess effect different scales roughness by numerically simulating flow over surfaces constructed band-passing spectral content scanned grit-blasted surface. Although velocity fluctuations found overall to be resilient changes, find existing correlations only qualitativ...