Magnetic fluid-based squeeze film between rough porous truncated conical plates

Abstract

Efforts have been made to analyse the performance of a magnetic fluid-based squeeze film between rough porous truncated conical plates. The lubricant used here is a magnetic fluid and the external magnetic field is oblique to the lower plate. The bearing surfaces are assumed to be transversely rough. The roughness of the bearing surfaces is modelled by a stochastic random variable with non-zero mean, variance, and skewness. An attempt has been made to average the associated Reynolds equation with respect to the random roughness parameter. The concerned non-dimensional equation is solved with appropriate boundary condition in dimensionless form to get the pressure distribution, which is then used to obtain the expression for load carrying capacity, paving the way for the calculation of response time. The results are presented graphically as well as in tabular form. This investigation reveals that the bearing system admits an improved performance as compared to that of a bearing system working with a conventional lubricant. The results suggest that the pressure, load carrying capacity, and response time increase with increasing magnetization parameter. It is observed that although the bearing suffers owing to transverse roughness in general, there is scope for obtaining better performance in the case of negatively skewed roughness. This performance further enhances especially when negative variance is involved.