Micropolar fluid squeeze film lubrication of finite porous journal bearing

• Published in: Tribology international 2011-04, Vol.44 (4), p.409-416
• Main Authors: Naduvinamani, N.B., Santosh, S.
• Format: Article
• Language: English
• Subjects: Applied sciences; Bearings, bushings, rolling bearings; Drives; Exact sciences and technology; Fatigue (materials); Finite difference method; Friction, wear, lubrication; Journal bearings; Lubrication; Machine components; Mathematical analysis; Mechanical engineering. Machine design; Micropolar fluids; Porous journal bearings; Squeeze films; Static and dynamic behaviours; Tribology
• ISSN: 0301-679X; 1879-2464
• DOI: 10.1016/j.triboint.2010.11.019

In this paper, the effect of micropolar fluid on the static and dynamic characteristics of squeeze film lubrication in finite porous journal bearings is studied. The finite modified Reynolds equation is solved numerically using the finite difference technique and the squeeze film characteristics are obtained. According to the results obtained, the micropolar fluid effect significantly increases the squeeze film pressure and the load-carrying capacity as compared to the corresponding Newtonian case. Under cyclic load, the effect of micropolar fluid is to reduce the velocity of the journal centre. Effect of porous matrix is to reduce the film pressure, load-carrying capacity and to increase the journal centre velocity. ► The effect of micropolar fluid on the squeeze film lubrication of finite porous journal bearing is studied. ► The effect of micropolar fluids is to (a) increase the load carrying capacity (b) reduce the velocity of journal centre. ► The effect of porous parameter is to reduce the load carrying capacity.