Fenómeno de Nano-lubricación en un Contacto Hdd/cabezal. Modelado y Simulación

Abstract

This paper presents a theoretical model of a lubricated line contact between smooth rigid elements, whose geometry is similar to that of the contact between reading-recording head and rotating disk, including the existence of a non-Newtonian lubricating fluid modeled by a power law. The model considers the molecular forces and is solved by a numerical technique based on the finite element method. The results show that molecular forces manifest significantly
over the load at thicknesses less than 5 nm and sliding speeds lower than 100 mm/s. In current discs (speeds over 50 m/s) , this means that the load would be purely hydrodynamic, while in certain micro engines (like those founded
in micro-electromechanics devices) whose speeds could be around 14 mm/s, the oscillatory nature of molecular forces could destabilize its operation condition.