*2.3.1 Fluid film lubrication regimes*

A thick film of lubrication was maintained in the region between two solid surfaces with no relative motion or lesser motion through an external pumping agency is called as hydrostatic lubrication [16]. The lubrication regimes which are noticed in fluid lubrication with self-acting can be recognized in the Stribeck curve as shown in **Figure 6**. This graph provides the hypothetical fluid-lubricated bearing structure with coefficient of friction as a function of the rotational speed (N) and absolute viscosity (η) divided by the applied load (P). This curve has a lowest with providing the recommendation that higher than one lubrication system is presented. In some cases, the lubrication regimes can be recognized through lubricant film parameter [17].
