A Study of Ferrofluid Lubrication Based Rough Sine Film Slider Bearing With Assorted Porous Structure

Abstract

This paper attempts to study a ferrofluid lubrication based rough sine film slider bearing with assorted porous structure using a numerical approach. The fluid flow of the system is regulated by the Neuringer-Rosensweig model. The impact of the transverse surface roughness of the system has been derived using the Christensen and Tonder model. The corresponding Reynolds’ equation has been used to calculate the pressure distribution which, in turn, has been the key to formulate the load carrying capacity equation. A graphical representation is made to demonstrate the calculated value of the load carrying capacity which is a dimensionless unit. The numbers thus derived have been used to prove that ferrofluid lubrication aids the load carrying capacity. The study suggests that the positive impact created by magnetization in the case of negatively skewed roughness helps to partially nullify the negative impact of the transverse roughness. Further investigation implies that when the Kozeny-Carman’s model is used, the overall performance is enhanced. The Kozeny-Carman’s model is a form of an empirical equation used to calculate permeability that is dependent on various parameters like pore shape, turtuosity, specific surface area and porosity. The success of the model can be accredited to its simplicity and efficiency to describe measured permeability values. The obtained equation was used to predict the permeability of fibre mat systems and of vesicular rocks.

Semi-analytical approach-based studies of the squeeze film lubrication between rough porous annular discs: Rabinowitsch fluid model

“…Vashi et al [23], have considered the Neuringer-Rosenzweig model to investigate the performance of circular stepped plates in the existence of couple stress, porosity, and SR Siddangouda et al [24] investigated the combined impact of SR and viscosity change brought on by additives on long journal bearing. According to Munshi et al [25], a rough porous sine film slider bearing with ferrofluid lubrication was subjected to a sinusoidal magnetic field.…”

Neuringer-Roseinweig Model Based Longitudinally Rough Porous Circular Stepped Plates in the Existence of Couple Stress

“…Among all these models, the stochastic approach given by Christensen and Tonder [12][13][14] is used very widely. Many investigators have studied the combined influence of surface roughness and ferrofluid for a distinct porous bearing configuration [15][16][17][18][19][20]. All these scrutinies discovered that the load capacity of the bearing is improved due to ferrofluid and negatively skewed roughness.…”