Squeeze Film Behaviour in Rotating Porous Annular Discs Lubricated with Magnetic Fluid

Abstract

The squeeze film behaviour between rotating annular discs, when the upper disc with a porous facing approached the parallel lower disc, was theoretically analysed. The lubricant was a magnetic fluid and the external magnetic field was oblique to the lower disc. Expressions were obtained for pressure, load capacity and response time in closed forms. Our aim was to study the effects of magnetization and rotation of the discs on dimensionless pressure, load capacity and response time whose computed values were displayed in tabular and graphical forms. In all cases, pressure, load capacity and response time increased with increasing magnetization while they decreased with increasing speed of rotation of the upper disc. However, all the quantities attained maximum values when both plates rotated in opposite directions with nearly the same speed.

Keywords: Magnetic fluid, Lubrication, Squeeze film, Annular discs, Rotation


(Af. J. of Science and Technology: 2003 4(1): 32-38)