Conventional Hydrodynamic Theory of Laminar Flow

Abstract

In real bearings the hydrodynamic conditions are complicated and are not precisely known. The variation in viscosity of oil within the bearing is large, imperfections of workmanship and temporary distortion of the bearing surface may be appreciable compared with the film thickness, the conditions determining the beginning and end of the pressure-bearing film are not accurately defined, and the film flow regime experienced in bearings of moderate speed does not prevail in all bearings. Hydrodynamic calculation is therefore made for a reference bearing in which the assumed conditions are simplified as compared with those in the real bearing.