Abstrato

Thermal Effects in Non-Newtonian Lubrication of Asymmetric Rollers under Adiabatic and Isothermal Boundaries

Dhaneshwar Prasad and Venkata Subrahmanyam Sajja

A theoretical aspect of thermal effects in hydrodynamic lubrication of roller bearings is analyzed under adiabatic and isothermal boundaries for heavily loaded rigid system. Basically, it describes a qualitative analysis of system with non-Newtonian incompressible power law fluids, in which the consistency of the lubricant is assumed to vary with the pressure and the mean film temperature. The fluid flow governing equations such as equation of motion with continuity and momentum energy equations are solved analytically first and then finally numerically by Runge-Kutta Fehlberg method. The various important characteristics of bearings are discussed and elaborated through graphs. As a nut cell, a significant change in pressure, temperature, load and traction with Newtonian and non-Newtonian fluids are characterized.