The present study investigates the effect of partial surface texturing, containing large number micro-dimples, in lubrication mechanisms. A CFD model is applied to examine influence texturing on pressure and velocity distribution flow between mating surfaces with relative motion or drop. Various parameters were analyzed. results indicate that equivalent volume step effectively simulates for a w...

Abstract The research on surface texture is developing from single macro-texture to composite micro-nano texture. current the anti-friction mechanism and theoretical models of textures relatively weak. Studying characteristics different types determining applicable working conditions each focus research. In this paper, a mathematical model hydrodynamic lubrication established based Navier–Stoke...

The friction between two polyelectrolyte gels carrying the same or opposite sign of charges has been investigated using a rheometer. It is found that the friction was strongly dependent on the interfacial interaction between two gel surfaces. In the repulsive interaction case, especially, the friction was extremely low. The friction behavior is attempted to be described in terms of the hydrodyn...

The virial expansion of the collective mobility ~sedimentation! coefficient is considered for hard sphere suspensions at equilibrium. The term of the second order in volume fraction, which involves three-particle hydrodynamic interactions, is calculated with high accuracy. To achieve that we represent the collective mobility coefficient as the sum of convergent integrals over particle configura...