Effects of Kozeny–Carman’s porous structure and Rosensweig’s viscosity on the ferrofluid-based various pad stators under dynamic conditions

Abstract

The present article intends to scrutinize various bearing configurations considering Rosensweig’s viscosity and Kozeny–Carman’s porous structure under dynamic conditions. The variable field is used to retain the contributions of all magnetic terms in the Shliomis model. The above system would have the advantage of creating a maximum field at the desired active contact zones. Rosensweig’s extension of Einstein’s viscosity is taken into consideration to enhance the fluid’s viscosity. The mathematical expressions for pressure and lifting force are derived by modifying the Reynolds equation using Beavers and Joseph’s boundaries. Under these dynamic conditions, results for various sliders for different parameters are obtained and compared vis-à-vis. The volume concentration and field strength improve the lifting force but the inlet–outlet ratio, slip, and porosity have the converse effects. The obtained results indicate that the lifting force with Rosensweig’s viscosity stays better than in the case of Einstein’s viscosity model. This model with varying field supports a higher load for Parallel in comparison to Exponential and Inclined pad stators. With the proper choice of the porosity parameter and the suspension of the particles, the higher load capacity of the Parallel slider bearing can be ensured.