FERROFLUID LUBRICATION OF A ROUGH POROUS SECANT-SHAPED SLIDER BEARING WITH SLIP VELOCITY
J. R. Patel, G. M. Deheri, S. J. Patel (DOI: 10.24874/jsscm.2017.11.01.07)
This article aims to discuss the combined effect of roughness and slip velocity on the performance of a ferrofluid based rough porous secant shape slider bearing. The slip model of Beavers and Joseph has been deployed to study the effect of velocity slip while the stochastic model of Christensen and Tonder has been used to calculate the effect of surface roughness. The concerned statistically averaged Reynolds’ type equation is solved with suitable boundary conditions to obtain the pressure distribution leading to the calculation of load carrying capacity. Further, the expression for friction and the position of center of pressure are obtained. It is observed that the bearing suffers due to surface roughness. However, this adverse effect can be reduced considerably by the ferrofluid lubrication taking the slip parameter at minimum. In this type of bearing system, the combination of slip velocity and skewness may play a crucial role in augmenting the bearing performance. Besides, the friction is found to be mostly decreasing or nominally increasing.