Thermal effects in externally pressurized porous conical bearings with variable viscosity

The present paper analyzes the porous constant gap externally pressurized c onical bearings when the slider is rotating with uniform angular velocity. The lubricant is assumed to be incompressible, and its viscosity varies exp onentially with temperature. The lubricant inertia due to rotation of the s lider is considered but the convective inertia is neglected. The energy equ ation is used to determine the temperature generated in the lubricant Film. The governing system of coupled momentum and energy equation is solved num erically, using finite difference method, to determine various bearing char acteristics. It is observed that for the surfaces which are highly porous t he inlet pressure decreases remarkably, resulting in reduced load capacity of the bearing, and the torque remains unaffected with respect to variation in the permeability.