Sage Journals: Discover world-class research

Abstract

The hydrodynamic characteristics of journal bearings with electrorheological (ER) fluid lubrication are studied in this article. The external applied electric field is partially imposed on the contractive part (arcwise) of the journal bearings. The bearing has a finite length and operates under incompressible laminar flow with steady conditions. The full three-dimensional Navier-Stokes (N-S) equations are solved numerically. The modified Bingham plastic model is used to describe the behavior of the ER fluid. In this study, the cavitation effects are also considered using viscosity modeling. The effects of electric field and eccentricity on the performance of journal bearings are investigated comprehensively.

Keywords

electrorheological fluid journal bearing yield stress cavitation

Get full access to this article

View all access options for this article.

References

Capriz, G. and Azzoni, V.D. 2004. ‘‘Flow of an Electrorheological Fluid in Small Clearances,’’ Meccanica, 39(2): 175-179 .

Dimarogonas, A.D. and Kollias, A. 1992. ‘‘Electro-rheological Fluid Controlled ‘Smart’ Journal Bearings,’’ Tribology Transactions, 35(4): 611-618 .

Gwynllyw, D.R. , Davies, A.R. and Phillips, T.N. , 1996. ‘‘On the Effects of a Piezoviscous Lubricant on the Dynamics of a Journal Bearing,’’ J. Rheol., 40: 1239-1266 .

Kollias, A. and Dimarogonas, A.D. 1994. ‘‘Electro-rheological Fluid Flow in Partial Journal Bearings,’’ In: ASME Winter Annual Meeting, Electro-Rheological Flows.

Krantz, J. , Tuomas, R. and Bhushan, B. 1999. ‘‘Electrorheological Fluids for Lubrication,’’ Lubric. Eng., 55(3): 28-35 .

Li, X.K. , Gwynllyw, D.R. , Davies, A.R. and Phillips, T.N. 2000. ‘‘On the Influence of Lubricant Properties on the Dynamics of Two-Dimensional Journal Bearings,’’ J. Non-Newtonian Fluid Mech., 93: 29-59 .

Nikolakopoulos, P.G. and Papadopoulos, C.A. 1996. ‘‘High Speed Journal Bearings Lubricated with Electrorheological Fluids: an Experimental Investigation,’’ Int. J. Modern Phys. B., 10(23&!24): 3045-3055 .

Nikolakopoulos, P.G. and Papadopoulos, C.A. 1998. ‘‘Controllable High Speed Journal Bearings, Lubricated with Electrorheological Fluids: an Analytical and Experimental Approach,’’ Trib. Int., 31(5): 225-234 .

Papanastasiou, T.C. 1987. ‘‘Flows of Materials with Yield,’’ J. Rheol., 31: 385-404 .

10.

Patankar, S.V. and Spalding, B.D. 1972. ‘‘A Calculation Procedure for Heat, Mass and Momentum Transfer in Three-Dimensional Parabolic Flows,’’ Int. J. Heat Mass Transfer, 15: 1787-1806 .

11.

Tichy, J.A. 1991. ‘‘Hydrodynamic Lubrication Theory for The Bingham Plastic Flow Model,’’ J. Rheol., 35: 477-493 .

12.

Tsamopoulos, J.A. , Chen M.F. and Borkar, A.V. 1996. ‘‘On the Spin-Coating of Viscoplastic Fluids,’’ Rheol. Acta., 35: 597-615 .

13.

Winslow, W.M. 1947. ‘‘Method and Means for Translating Electrical Impulse into Mechanical Force,’’ U.S. Patent No. 2,417,850.

14.

Zhang, Z. and Zhu, K.Q. 2002. ‘‘Characteristics of Electrorheological Fluid Flow in Journal Bearings,’’ Chin. Phys. Lett., 19(2): 273-275 .

Hydrodynamic Characteristics of ER Journal Bearings with External Electric Field Imposed on the Contractive Part

Abstract

Keywords

Get full access to this article

References