The effects of couple stresses in the squeeze film characteristics between A cylinder and a plane surface

Abstract

On the basis of the Stokes micro-continuum theory, the effects of couple stresses resulting from the lubricant blended with various additives upon the squeeze film behavior between a long cylinder and a plane surface are analyzed. Compared to the conventional Newtonian-lubricant case, the couple stress effects characterized by the couple stress parameter signify an improvement in the squeeze film characteristics. Increasing values of the couple stress parameter increases the hydrodynamic load-carrying capacity and provides a longer time to prevent cylinder-plane surface contact. The approaching time of the cylinder in reducing the film thickness hm = 1 to hm = 0.01 for the couple stress fluid lubricant is about 27.67, which is longer than the approaching time 22.62 for the case of a Newtonian lubricant.