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Advances in Tribology
Volume 2013, Article ID 743987, 7 pages
http://dx.doi.org/10.1155/2013/743987
Research Article

Effect of Viscosity Variation on the Micropolar Fluid Squeeze Film Lubrication of a Short Journal Bearing

Department of Mathematics, Gulbarga University, Gulbarga 585 106, India

Received 19 June 2013; Revised 26 August 2013; Accepted 26 August 2013

Academic Editor: Patrick De Baets

Copyright © 2013 N. B. Naduvinamani and Archana K. Kadadi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A theoretical study of the effect of the viscosity variation on the squeeze film performance of a short journal bearing operating with micropolar fluid is presented. The modified Reynolds equation accounting for the viscosity variation in micropolar fluid is mathematically derived. To obtain a closed form solution, the short bearing approximation under constant load is considered. The modified Reynolds equation is solved for the fluid film pressure and then the bearing characteristics, such as obtaining the load carrying capacity and the squeeze film time. According to the results evaluated, the micropolar fluid as a lubricant improves the squeeze film characteristics and results in a longer bearing life, whereas the viscosity variation factor decreases the load carrying capacity and squeezes film time. The result is compared with the corresponding Newtonian case.