Magnetic fluid lubrication of bearings each having a porous faced stator and a slider having various shapes

Rajesh C. Shah¹ - M. V. Bhat²

¹ Department of Mathematics, Nirma Institute of Technology, Sarkhej-Gandhinagar Highway, Ahmedabad -- 382 481, Gujarat State, India
² E-202, Riddhi Complex, Near Jodhpur Village, Ahmedabad - 380 015, Gujarat State, India }

Abstract
An analysis of slider bearings, each having a porous faced stator, and a slider, having various shapes (e.g., inclined plane, exponential, convex and secant) was made using a magnetic fluid lubricant flowing as per Jenkins flow behaviour. Expressions were obtained for various bearing characteristics. Values of the load capacity, friction on the slider, the coefficient of friction and the position of the centre of pressure were computed in each case and presented in a tabular form for different values of the material parameter. Whatever is the shape of the slider, the load capacity decreased, friction as well as the coefficient of friction increased and the position of the centre of pressure shifted towards the bearing inlet when the material parameter increased. For a convex slider, the load capacity and friction were maximum, and the centre of pressure is the nearest to the inlet for a given material parameter. The coefficient of friction was the greatest and the position of the centre of pressure the farthest from the inlet, while the load capacity was the least in the case of a secant shaped slider. However, friction and the coefficient of friction were found to be the least for an inclined plane slider. Tables 1, Figs 2, Refs 8.