Lubrication of asymmetric rollers considering viscosity as function of mean temperature

Author:

Lanka Swetha,Sajja Venkata Subrahmanyam,Prasad Dhaneshwar

Abstract

A theoretical analysis of an asymmetric roller bearing system with cavitation that is hydro-dynamically lightly loaded and lubricated by a thin, incompressible fluid is presented. The lubricant adheres to the non-Newtonian Bingham plastic fluid concept, in which the viscosity of the fluid should change depending on the mean film temperature. The continuity and momentum equations, which regulate fluid flow, are first solved analytically and then numerically using MATLAB. Through graphs and tables, some key bearing features are addressed and further explained. This leads to the conclusion that there is a discernible difference between Newtonian and non-Newtonian fluids in terms of pressure, temperature, load, and traction. The findings are good in line with the body of literature.

Publisher

University of Zielona Góra, Poland

Subject

Fluid Flow and Transfer Processes,Transportation,Civil and Structural Engineering

Reference16 articles.

1. Dhaneshwar Prasad, Sudam Sekhar Panda and Subrahmanyam, S.V. (2012): Non-Newtonian squeeze film lubrication of journal bearing with temperature effect.– Int. J. of Eng. Sci. & Adv. Techn., vol.2, No.3, pp.438-444.

2. Dhaneshwar Prasad, Subrahmanyam, S.V. and Sudam Sekhar Panda (2012): Thermal effects in hydrodynamic lubrication of asymmetric rollers using Runge-Kutta Fehlberg method.– Int. J. of Eng. Sci. & Adv. Techn., vol.2, No.3, pp.422-437.

3. Characterization of lubrication of asymmetric rollers including thermal effects

4. Behavior of a bingham-like viscous fluid in lubrication flows

5. Milne A.A. (1954): A theory of rheodynamic lubrication.– Kolloidk-Z, 139 Haft 1/2, pp.96-101.

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