Hydromagnetic Squeeze Films between Porous Rectangular Plates with Couplestress Fluids

Abstract

The theoretical investigation made in this paper is to study the effect of transverse magnetic field on the performance characteristics of porous squeeze film lubrication between two rectangular plates with couplestress fluids. A most general modified Reynolds equation is derived using Stokes constitutive equations for couplestress fluids. The fluid in the film region and in the porous region has been modeled as a couplestress fluid. The analysis takes into account velocity slip at the porous interface using Beavers-Joseph criterion. A closed-form expression for pressure, load carrying capacity and squeeze film time are obtained. The results are presented for different operating parameters. It is observed that effect of couplestresses on the MHD squeeze film lubrication between porous rectangular plates is to increase the load carrying capacity significantly and to delay the time of approach as compared to the corresponding non-magnetic case and Newtonian case.

Effect of viscosity variation on non-Newtonian lubrication of squeeze film conical bearing having porous wall operating with Rabinowitsch fluid model

“…7 Wada et al 8 used modified Darcy's law for non-Newtonian fluid. In last few decades, several researchers have investigated the characteristics of bearings and fluids using different kinds of models having porous structure, such as magnetic fluid for rough porous truncated conical plate by Deheri et al, 9 ferrofluid for curved porous circular plate by Shah and Patel, 10 micropolar fluid for sphere and rough porous flat plates by Elsharkawy and Fadhalah, 11 couple stress fluid for porous rectangular plate by Fathima et al 12 and, recently, Walicka et al 13 used Rabinowitsch fluid to study the curvilinear squeeze film bearing with porous wall. In the analysis of the load-carrying mechanism for both hydrodynamic and elastohydrodynamic bearings viscosity was found to be the most influencing property of fluids.…”

Two – Dimensional Reynolds Equation for Squeeze film lubrication between wide parallel rectangular plates with the effect of Magnetic field and Micro – Polar fluid

“…In a recent study conducted by Naduvinamani and Ashwini [11], an analysis was performed on the phenomenon associated with stepped porous parallel plates with micropolar fluid squeeze film lubrication for MHD. The examination of magnetohydrodynamic (MHD) lubrications pertaining to different bearing geometry [12][13][14][15][16] has demonstrated numerous practical implications within the framework of industry. Over the course of analyses, it has been observed that the magnetic field demonstrates significant enhancements in bearing characteristics when compared to the classical case.…”

“…Figures 11,12, and 13 depict the non-dimensional load * W in relation to various parameters. Specifically, Figure 11 illustrates the *…”

Effect of Magnetohydrodynamics and Couple Stress on Steady and Dynamic Characteristics of Plane Slider Bearing

“…Comparing with the MHD inclined-plane slider bearing, the MHD parabolic-film bearing signifies an improvement in the steady performances and the dynamic characteristics. Syeda Tasneem Fathima et al, [5] presented the analysis of Hydromagnetic squeeze films between porous rectangular plates with couple stress fluids. These authors predicted that effect of couplestresses on the MHD squeeze film lubrication between porous rectangular plates is to increase the load carrying capacity significantly and to delay the time of approach as compared to the corresponding non-magnetic case and Newtonian case.…”