Inertia effects in circular squeeze film bearing using Herschel–Bulkley lubricants

Abstract

a b s t r a c tRecent engineering trends in lubrication emphasize that in order to analyze the performance of bearings adequately, it is necessary to take into account the combined effects of fluid inertia forces and non-Newtonian characteristics of lubricants. In the present work, the effects of fluid inertia forces in the circular squeeze film bearing lubricated with Herschel-Bulkley fluids with constant squeeze motion have been investigated. Herschel-Bulkley fluids are characterized by an yield value which leads to the formation of a rigid core in the flow region. The shape and extent of the core formation along the radial direction is determined numerically for various values of Herschel-Bulkley number and power-law index. The bearing performances such as pressure distribution and load capacity for different values of Herschel-Bulkley number, Reynolds number, power-law index have been computed. The effects of fluid inertia and non-Newtonian characteristics on the bearing performances have been discussed.

Inertia Effects in Rheodynamic Lubrication of an Externally Pressurized Converging Thrust Bearing using Herschel-Bulkley Fluids

“…Once the yield stress exceeds the material flow with a non-linear stress-strain relationship, it exhibits itself either as a shear thinning or shear thickening fluids. Many researchers like Alexandrou et al (2001), Chan and Baird (2002), Huilgol et al (2005), Vishwanath and Kandasamy (2010) and Ponalagusamy and Priyadharshini (2019) have used H-B fluids to study their flow problems.…”

Effects of viscosity‐pressure dependency on the non‐Newtonian squeeze film of parallel circular plates

“…Common non‐Newtonian lubricants are synovial bio‐fluids, polymer‐thickened oils and base oils mixed with long‐chained additives. Different non‐Newtonian fluid models have been applied to investigate the lubrication performance of various problems, such as the Herschel–Bulkley model in the circular squeeze‐film bearings by Vishwanath and Kandasamy, the Ellis model by Bair and the power‐law model by Chu et al in the thin‐film elasotohydrodynamic lubrication, the Robinowitsch model by Lin in the slider bearings and the micropolar fluid model by Lin et al in the sphere–plate squeeze films. On the other hand, a non‐Newtonian microcontinuum model of couple‐stress fluids is originated from the conventional Newtonian theory of fluids by Stokes .…”

Analytical study on damping performances of magnetorheological grease damper based on disk squeeze mode and experimental test

“…Kalyon and Tang [7] used an inverse problem solution for the squeeze flow of parameters of generalized Newtonian fluid and wall slip. Vishwanath and Kandasamy [8] studied the inertia effects in a circular squeeze film bearing using Herschel-Bulkley lubricants. Fluid flow characteristics under the squeeze model were also theoretically investigated by Zhu and Ge [9].…”