Flow characteristics of a powder lubricant sheared between parallel plates

This paper is devoted to the understanding of the flow characteristics of a powder lubricant. An accurate and realistic model is introduced to investi gate the mechanism of powder lubrication sheared between two infinitely wid e parallel plates. In this theory, the solid volume fraction, v, together w ith flow velocity and granular temperature are directly obtained from a set of complete governing equations (mass, momentum and pseudo-energy conserva tion equations). The boundary conditions take into account the effect of sl ip velocity and the wall surface roughness. A set of parametric simulation results is presented. It is shown that viscous dissipation plays an importa nt role in the pseudoenergy equation.