Multi-scale modeling of lubricated contacts: a study on the velocity boundary condition at the wall-fluid interface
Résumé
Hence, the aim of this work is to propose a simple way to integrate results from molecular dynamics into continuous models. A detailed analysis of the velocity boundary condition at the wall-fluid interface is performed using MD simulations at the nanometer-scale. The evolution of wall slip and locking as a function of the operating conditions, surface and lubricant nature is quantified through semi-analytical laws [2, 4]. A modified Reynolds equation is proposed, where the classical no-slip boundary is replaced by locking and wall slip conditions. Finally, lubricated contact is studied to understand the possible impact of molecular phenomena on the tribological behaviour at larger scales.