combined effect of slip velocity and roughness on the jenkins model based ferrofluid lubrication of a curved rough annular squeeze film

This paper theoretically analyzes the combined effect of slip velocity and surface roughness on theperformance of jenkins model based ferrofluid squeeze film in curved annular plates. the effect ofslip velocity has been studied resorting to the slip model of beavers and joseph. the stochasticallyaveraging method of christensen and tonders has been deployed for studying the effect of surfaceroughness. the pressure distribution is derived by solving the associated stochastically averagedreynolds type equation with suitable boundary conditions, leading to the computation of load car-rying capacity. the graphical representations reveal that the transverse surface roughness adverselyaffects the bearing performance. however, jenkins model based ferrofluid lubrication offers somescopes in minimizing this adverse effect when the slip parameter is kept at minimum. of course,an appropriate choice of curvature parameters adds to this positive effect in the case of negativelyskewed roughness. moreover, it is established that this type of bearing system supports certainamount of load; even when there is no flow which does not happen in the case of conventionallubricant based bearing system.